To reverse a string in a cell, following formula can be used
=CONCAT(LEFT(RIGHT(A2,SEQUENCE(LEN(A2)))))
For many cells in a range, following formula can be used
=BYROW(A2:A11,LAMBDA(a,CONCAT(LEFT(RIGHT(a,SEQUENCE(LEN(a)))))))
The Excel file related to this tips can be downloaded from Tips & Tricks 200 – Reverse Text