Sounds way low for Repubs.
It matches right up with most other polls taken in the last year or so.
https://www.theguardian.com/us-news/2024/jan/02/poll-biden-2020-election-illegitimate
https://www.cnn.com/2023/08/03/politics/cnn-poll-republicans-think-2020-election-illegitimate/index.html
https://www.nbcnews.com/meet-the-press/meetthepressblog/poll-61-republicans-still-believe-biden-didnt-win-fair-square-2020-rcna49630