Typeface, not font. Also, one of the better ones for dislexia is a stretch given there's actually no hard proven data, it's all anecdotal & preference based. It's not HORRIBLE but there are plenty of ones that lots of studies focus on that have marginal potential.

We have 2 approaches: 1 being good lettering + how much families enable good reading and 2 being the cognitive processing of information via text. Comic Sans falls very mid on both but that's not necessarily bad either.

If we want to talk dislexia alone, OpenDyslexic followed by the still growing Atkinson Hyperlegible even as a serif, COULD be marginally be the better ones.

Comic Sans has one big advantage, it's ubiquitous. That means that dyslexics have more chances to see the appeal of it in comparison with blocky monolithic Serif typefaces.

Dyslexie is the actual one that opened Pandora's box regarding dyslexia assisting typefaces but that's a rabbit hole for another time. It's fascinating & forever changing.