Im composing a piece for piano and the double fermati are not desired, is there a way to remove said fermata or make it invisible or something?
Welcome to the forum broempoef! Fermatas are automatically shown on every staff, and once per voice on each staff. You can change the number of fermatas shown by default in Engrave > Engraving Options > Holds and Pauses > Fermatas, and for individual fermatas by selecting them and using the “Max. fermatas per staff” property in the Properties panel at the bottom of the window.
If you mean you only want to show one fermata on one staff, you might prefer to create a custom playing technique that looks like a fermata that you can then input wherever you like.