Rather unfortunately, many clubs and events use these apps to coordinate routes. One ride event I did used RidewithGPS, and I never use it normally.

Alternatively, if you can export the GPX file, you can import it to your privacy-first app, like OSMand.

I switched to Osmand when my bike computer got stolen and tbf I prefer Osmand, especially with the widgets and stuff set up for the cycling profile

Or Fitotrack, which has an even nicer dashboard (with horrible colors, unfortunately) to screenshot and send to friends to brag (not that I’d ever do that ^__)