At this point I don't understand why anybody would even bother trying to visit any of the popular spots.
For example we were in Madrid in 2019. The queue to the Prado was round the block. It was hundreds of metres long.
I don't care what's in the Prado, but it's not that good. The Mona Lisa can't be that good. The Sistine isn't that good.
Find another chapel. Find a smaller gallery. Find a lesser-known work. And actually enjoy it, rather than just seeing it so you can take your photo and tick the box.