There are some countries, which reward their athletes handsomely, either financially or via some form of compensation through benefits. However, you will generally find that they don't have a comprehensive program or a support network in place, and the historically low medal count might have a role to play. There are also detractors, who don't agree with the practice of paying for medals.
https://old.reddit.com/r/olympics/comments/orije1/check_out_...
https://www.cnbc.com/2021/07/29/tokyo-olympics-how-much-athl...
https://techpolicyinstitute.org/publications/miscellaneous/d...