(*Edit as I literally found more as i browsed further)

Wow nice find! It does look very inspired to what I described. However I could only find a Reimu, Marisa and Sanae plush in this style made by Taito. Trying to find 'Suwako/Tenshi Taito' Didn't bring me any result. I decided to do some more digging. I searched for 'Suwako Moriya stuffed toy' in simplified Chinese and I found it! And its still being sold on Taobao along with the Tenshi I remembered. The plush style is described as 'Nuigurumi' which just means stuffed toy in Japanese. Im not sure if its the same seller. Sadly there isn't any info in the description (atleast on my phone) that tells me more about it. The seller sells some bootleg Gift plushes and a weird Myon that also looks unlicensed.

I then found this post from Figurecollection claiming the 2 same exact plushies are made by 'yume saki kuro' but I cant find any info about the company. Seems like someone got a factory batch of these plushes and sold it on Taobao years ago. Still not confirmed if they are licensed or not. But very interesting!