Yes, everyone acknowledges there is a huge difference in how Clinton reacted in the immediate aftermath of her election loss, compared to how Trump behaved in the same situation.

The opinion piece I linked argues that Democrats pushing the "2016 election was stolen" narrative provided normalization and encouragement for Republicans to push a similar narrative in 2020 - even though the actions taken in response to that narrative were very different.

In turn, I think the 2020 Republican claims have been encouraging pre-emptive 2024 Democratic claims - see below examples - and if Democrats lose in 2024, they've already got these pre-planned narratives at hand to invoke

https://www.rollingstone.com/politics/politics-news/trump-pu...

https://edition.cnn.com/2022/04/27/opinions/gop-blueprint-to...

https://progressive.org/op-eds/gop-plan-steal-2024-election-...

https://www.theatlantic.com/ideas/archive/2021/07/democracy-...