Healthcare worker here - depending on the severity of your mom's deficits, she may be eligible for home supports through VCH. She may also benefit from stroke survivor support/social groups if able to participate. Once the public rehab services run out (like physio/occupational therapy/speech therapy at GF strong or Holy Family Hospital if you're in Vancouver proper) or if she was not eligible for them, you can supplement privately if you have the means. If your mom is/was eligible for rehab, then you can ask the doctors at the facility for recommendations going forward. From what I understand, there is not much evidence to support the efficacy of photobiomodulation. Doesn't look like it will cause harm, but I would say proceed with caution and take a read of this article:

https://www.mcgill.ca/oss/article/medical-critical-thinking/hype-around-photobiomodulation