You know, both sides doing something doesn't mean or even imply that it's to equal degree. It's just that both sides in the US seem to be doing it right now.
On this point, you are completely wrong. When you have one party making election denialism a core of their belief system while on the other side you have a few random people making claims on social media, it is absurd to claim that “both sides … seem to be doing it right now”. The very fact of you attempting to make the argument implies that there is equivalence between the two sides.
No, both sides have not made denialism central to their party platform. No, the Democrats did not have any cabinet nominees who refused to acknowledge the legitimacy of the last election. No, both sides did not storm the Capitol building in an attempt to prevent the certification of the election.
No, both sides are not doing it.