SeatGeek has ADA information available for the venues of teams for which SeatGeek is the primary ticketing provider. For most other events and venues, we've found that this information changes frequently and so we will only be able to provide these details when a seller notes it in their listing.
We recommend that you contact the venue directly to find out which seats are ADA accessible. Often times, venues will also have additional accessibility information listed on their website so it is always worth checking with the venue first!