My phone uses wpa_supplicant v2.10-devel-11 (from late 2021 I think) and I see in NeoStumbler that the record is at 227 access points (from this vantage point: https://osm.org/go/0GAnN~St0?m)

The query for anyone else who has that app and is curious:

    > .he on
    > select reportId, count(id) as c from WifiAccessPointEntity group by reportId order by c desc limit 10;
    reportId|c
    123|227
    > select * from PositionEntity where reportId = 123; -- find where this was

Are you sure it's a wpa_supplicant limitation? It sounds like a very arbitrary number, not even 2^8=256 or something, so like it should be trivial to find and chance that constant limit in the source code, if this limit exists

Edit: a quick grep through the source code (`grep -rE '[^0-9]200[^0-9]'`) doesn't reveal anything that looks very promising at first glance. I'm curious what you're running into now though