I'm planning to move to Spain next year with my younger sister (she was diagnosed with ADHD last month and needs special care). Here's what I found: https://sid.usal.es/faq.aspx?ID=200
You may also check the list on Expat Forum: special needs school in costa blanca north:
https://www.expatforum.com/expats/expats-living-spain/special-needs-education-writemyessaytoday