Will getting more than 50% of your calories from MUFAs raise your LDL cholesterol?

Unlike small amounts of MUFAs?

I don’t know, but the saturated fat that comes with the MUFAs will.
Trials that show a reduction in LDL from replacing SFA with PUFA, MUFA or carbs, in order of size of effect, have balanced macros I think. So it’s hard to generalize from those results in very high fat diets except that SFA increases LDL. I’ve seen a few people eat very high fat, even from healthy sources, yet have above optimal LDL, sometimes very high.