I could see what I could do to share my data set from my website: https://www.chessratingcomparison.com/ . I've got about 4300 different players who have submitted their ratings
Chess.com Rating Comparisons 2021
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Hello everyone.
I'm working recently on rating comparisons (chess.com - USCF - FIDE). Please enter your ratings and help me to expand my database!
https://forms.gle/7j6V8hk6FAxgdVuq9
(The database is updated to 2021)