I deleted a lot of old things i didnt need and i made space but it wasnt ideal.
Any further project you create i advise you do direct in uefn as the memory thing is weird when converting especially with the item devices.
You can look into world streaming/data layers to save memory on anything but devices pretty much so this may help you cut down memory without having to prune too much.
If you dnt understand what these things are i can find vids on yt for you