We had maybe 4 months of Republicans trying to validate and such the ballots, to yes (you're right) overturn election results. Then when all of the routes of possibility closed up, they stopped trying to overturn it.
Hilary Clinton, Main stream media, and various other democrats spent 4 years trying to illegitimize Trumps victory of 2016.
We ignored Clinton trying to do it. We also ignored the folks who were screaming for it to be reversed in 2020 after the possible routes to victory were shut down.
In other words - democrats are sore losers and Republicans are sore losers - but Republicans get over it quicker.