Yes, each method has its own limit:
Function Method: up to 250 fee rules. The app shows a warning as you get close to the limit.
Block Method: up to 50 fees.
Everywhere Method: no set number of fees. The settings for each fee add to one shared storage limit. The condition list (like product tags or collections) can hold up to 100 entries, and the shared storage limit will show on the fee editor.