If you can get a .fit file or a .gpx file then you should be able to import them into Strava, RideWithGPS or any other site you want to put them on.
Just get them all in one folder on your computer, then use the sites manual upload to upload them. Once back in the "old" days the sites wanted me to upload them all individually one by one. However I got around that by putting them on my device. And then if would upload everyone that was new to the site. But since it was more data than my device could hold, I had to do it in several moves and deletions on the device. However I think that they now let you upload more than one ride at a time manually from your computer now. If you only have a smartphone, I don't know what to tell you.