You already asked a similar question in this thread of yours:
https://www.photrio.com/forum/threads/canon-a1-iso-dial-and-exposure-compensation.190706/
"can an ISO dial be changed in the middle of the film"
On which I replied.
One has to distinguish between
-) exposure compensation for metering within a roll
-) exposure compensation for push/pull within a roll
-) At the first the development is the same. And it is doable.
-) At the second each time exposure compensation is changed, development has to follow. This is only doable within a roll, if before any change the already exposed film is cut off for seperate processing. Alternatively one could note frame numbers and leave one or two safety frames inbetween and only in the darkroom cut te film respectively.