Possible reason for this being - https://www.sec.gov/news/press-release/2020-338 and its related outcomes which I have checked yet.

You can read the full court proceeds here - https://www.sec.gov/litigation/complaints/2020/comp-pr2020-338.pdf

My current suggestion for you would be to not deal with XRP for now.

Still if you want to take the risks, you can find a list of exchanges that are known to offer XRP here - https://www.coingecko.com/en/coins/xrp#markets

Again the P2P market here on the forum can also be a record free exchange for you. Post a trade in the "Currency Exchange" section of the forum and see if anyone is willing to trade.