Delirium peformance on Xbox One

I cant clear a 20% deli map without crashing at least 3 times.
Deli mirror also crashes 9/10 times.
Simulacrum 1-2 FPS after wave 17-18 + crashes alot.

Can we get an optional peformance mode on old gen like 720p no shadows etc. ?

They will do nothing. Console are not made to play juiced maps. If you play delirium map, don't add beyond monsters, don't play on a conquerant map and don't do breach or other things like that.

Unfortunately, the best solution to the performance of juiced maps is to upgrade the console to a Series S or Series X. It sucks that the new gen consoles are still very difficult to attain due to supply shortages, but XOne is now past gen and the performance of PoE will only get worse as they add more content each league.
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I have the same issue with Delirium. Only in my case, the mobs don't even load on the screen until a good 20 seconds into the encounter, which then I'm basically shooting blindly at invisible targets hoping not to die.