Additional assignment info - How to hide edit icon

Summary:

I would like to hide the edit icon from the additional assignment info section for all users, is it possible?

Content (please ensure you mask any confidential information):

Hi experts,

from My Client Group -> Quick action -> Additional Assignment Info, I would like to make this section read-only for all users,or alternatively I would like to not allow changes for certain roles, is this possible?

I tried to hide it from page composer, but it won't let me edit that icon.

am i doing something wrong in page composer? is it possible to hide the icon for all users?