Is there any solution? Signer can only sign, and can't make any other changes in the form.

When we send a request using the fill and sign feature for others' signatures, all fields should be read only so that the signer can only sign, and can't make any other changes in the form, I added a script but the script is not working,  Is there a way to have only the signature fields fillable and all other fields read only-only?

There is one way, but it's assigning a default AnyOne to fields that should be Senders. Changing each field manually every time is very difficult because there are more pages. Can anyone help, please?