OP wrote “ My apps only use about 3gb of storage however my macbook says that it uses 63 gb which is impossible, is this a glitch? “
How has it been determined “ My apps only use about 3gb of storage “ ?
Where does this 3 GB figure come from ?
Perhaps a screen shot of what and where is 3 GB is appearing ?
Interesting and running macOS 15.5 Sequoia
When I go System Setting >> General >> Storage >> Applications
It is showing 8.1 GB of applications

When I click the small I in circle

Low and behold the 8.1 GB matches the previous figures
Just saying.
In the original premise is incorrect all other calculations will be equally incorrect and misleading