<pre><span><style>
[data-test*="nav-button-Edit"] svg {
display: none !important;
}
[data-test*="nav-button-Edit"] div {
border-radius: 50% !important;
background-size: cover !important;
background-repeat: no-repeat !important;
background-position: center !important;
background-image: url(PHOTO) !important;
width: 35px;
height: 35px;
}
<aside> 📌 Use a Template column to paste the code and replace PHOTO for the picture column your prefere most. Use a Rich Text with this template column in the tab you want to replace the edit button for a picture.
</aside>
<aside> 💡 Once the Edit button still works, my suggestion is to use Users spreadsheet for this tab and filter by email is signed-in user.
</aside>