From my experience, once you’ve booked any combination of resort nights and park tickets as a package, you cannot cancel the resort completely or tickets completely without cancelling the whole package (which in this case would probably incur the penalty). Maybe others have experienced exceptions to that.
I tried cancelling just the resort and keeping the tickets so that I could link a better 3rd party resort deal to take its place, but they made me cancel the entire package. Luckily the reimbursement was almost instant back onto my Disney gift cards so that I could use some of that to instantly buy new park tickets to avoid losing my FP’s or having to tie up new money in tickets while waiting to be reimbursed. I’m within 30 days but wasn’t penalized for cancelling because I had already linked the 3rd party resort reservation to MDE, so they were fine with replacing with another on-site stay even thought it wasn’t booked directly through Disney anymore.