Is it common to dissolve fillers and get them redone?

I'm thinking of getting fillers for the first time.
I was worried because I heard from people around me that there are more cases of dissolving fillers than I thought.

I don't intend to put in much from the start.
I would like to improve just a little bit of the parts that are lacking.

However, if you are not satisfied after the procedure
I thought it would be a good idea to find out first if it could be removed.

I am also curious if there are cases where it can be dissolved and cases where it cannot, depending on the type of filler.

It would be right to ask about these details in advance during the consultation, wouldn't it?

For those receiving fillers for the first time, what did you check most thoroughly before the procedure?
I would appreciate it if you could share your experiences.