Quite frankly, all things equal, what you are describing is a relational database and would work best in a relational database program like Microsoft Access.
That being said, I know many people do not have Microsfot Access or the skills in Microsoft Access to create something like that.
One option would be to use Power Query, which allows you to do database-like operations in Excel. There is a whole forum devoted to the
Power Tools.
Other than that, you want want to look at matching formulas like XLOOKUP, VLOOKUP, and INDEX/MATCH to look up your values are bring them back to your summary sheet.
You can even use INDIRECT and/or INDEX functions to dynamically get the values, if the names of the sheets match the people (so you do not need to hard-code the sheet names in your formulas).
And of course, VBA is always an option too.
Some of the options available to you may be limited by which version of Excel you are using. I suggest that you update your
Account details (or click your user name at the top right of the forum) so helpers always know what Excel version(s) & platform(s) you are using as the best solution often varies by version. (Don’t forget to scroll down & ‘Save’)
If you require more assistance, much more specific details will be needed, i.e. what your data structure is, what you want the final result to look like, etc.