It would be extremely convoluted to actually parse the tracks/gpx and compare to OSM... Since we don't have that many of them, it might be too much effort for little benefit.
Should check that they are closed/connected (same logic can be used for different routes, also this may be relevant to PSV routing stuff)
There are several attempts by various organizations to collect cycle routes in maps.
Best candidate is newish https://balticcycling.com/karte/
Other resources like https://aktivalatvija.lv/latvijas-velomarsrutu-kartes-liels-apkopojums/ or https://www.bicycle.lv/velo-marsruti/ or regional municipality pages don't have anything easily parsable
It would be extremely convoluted to actually parse the tracks/gpx and compare to OSM... Since we don't have that many of them, it might be too much effort for little benefit.
Should check that they are closed/connected (same logic can be used for different routes, also this may be relevant to PSV routing stuff)