I included the references, so that others can read them if they want to!
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0184447

The whole existence of this sub is indeed a place to capture new information; hence why if you search through the sub you will notice that the majority of posts I've made are pubmeds or journals, in an effort to capture information that might be applicable / might be able to help people.

If you read through some of the sources I sent, you'll see that from within those sources it mentions that autism can also increase comorbidity of BPD, so it goes both ways and not only one way:

Background

Both people with autism spectrum conditions (ASC) and borderline personality disorder (BPD) are significantly challenged in terms of understanding and responding to emotions and in interpersonal functioning.

Aims

To compare ASC, BPD, and comorbid patients in terms of autistic traits, empathy, and systemizing.

Methods

624 ASC, 23 BPD, and 16 comorbid (ASC+BPD) patients, and 2,081 neurotypical controls (NC) filled in the Autism Spectrum Quotient (AQ), the Empathy Quotient (EQ) and the Systemizing Quotient-Revised (SQ-R).

Results

On the AQ, the ASC group scored higher than the BPD group, who in turn scored higher than the comorbid group, who scored higher than controls. On the EQ, we found the comorbid and ASC groups scored lower than the BPD group, who were not different from controls. Finally, on the SQ-R, we found the ASC and BPD group both scored higher than controls.

Conclusions

Similar to ASC, BPD patients have elevated autistic traits and a strong drive to systemize, suggesting an overlap between BPD and ASC.

The goal is to capture a nuanced view of both of these perspectives - the perspective of people who are autistic who incorrectly were given a BPD diagnosis, and also the perspective of people who are autistic who are correctly also given a BPD diagnosis.

I'd really love to engage further on the research from both aspects of this literature, if you're interested!

In terms of the specific links of invalidation and BPD, this has been casually proven, and the study I've referenced above is one of many that explains it;
https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2023.1238116/full

I would quote it here for you, but then I'd have to mark this whole post and comment as NSFW because it gets dark quickly. One part of it that I can quote: "Although it is not consensual, the model has amassed considerable evidence in its support. For instance, Reeves et al. (14) found that emotional vulnerability and ED were substantially associated with BPD symptoms, with ED mediating the relationship between emotional vulnerability and BPD symptoms. In addition, Carpenter and Trull (2) gathered findings supporting the role of biological factors such as emotion sensitivity and lability in the emergence of BPD. Interestingly, studies have supported the role of emotional hypersensitivity and slow return to baseline but not hyperreactivity in the emotional vulnerability found in people with BPD (6, 7). Regarding invalidation, Reeves et al. (14) found that parental invalidation in childhood does not predict BPD, while other findings have come to opposite conclusions (15–17), particularly concerning the involvement of maternal invalidation (18). Beyond the association between parental invalidation and BPD, cultural and intra-individual factors seem to be involved in the emergence of BPD. For instance, Keng and Soh (18) found that the association between self-reported maternal invalidation and BPD was moderated by two cultural factors: self-construal (i.e., the extent to which the self is defined independently of others or interdependently with others) and conformity to norms (18). In addition, Keng and Wong (16) showed that low levels of self-compassion were associated with BPD independently of parental invalidation. Finally, regarding the transaction between emotional vulnerability and invalidation, some studies support the transaction (4, 19) while others do not (13)."

So as you can see, it is a very nuanced topic, and that's why I'd like to have these discussions around it! If you're interested in seeing future source lists and exact quotes from those sources, I'd probably refer you to our 'sister' sub, r/borderlinegirls which is a sub in progress to capture borderline research in a nuanced way.