I'm not personally a stamps guy but I'm seeing a lot of inefficient finagling going on with the css display property and float and all sorts of things, so here's some very simple snippets for your stamp boxes:
Grid
Pros: consistent column layout—3 side-by-side on mobile, 6 side-by-side on larger screens.
Cons: capped at 6 side-by-side due to there not being a lot of tailwindCSS available.
<div class="grid tablet:grid-cols-6 grid-cols-3" style="justify-items:center;gap:1rem;">
<a href="#URL"><img src="https://fakeimg.pl/99x56?text=stamp" class="m-0"></a>
<a href="#URL"><img src="https://fakeimg.pl/99x56?text=stamp" class="m-0"></a>
[.. repeat for as many images as desired]
</div>
Flexbox
Pros: Any number of stamps side-by-side, meaning more efficient use of space.
Cons: inconsistent column layout, if your stamps vary in size they won't line up as neatly, and it's less predictable how they'll be spaced out on different screens. What might be 12 columns for one person might be 7 for another.
<div class="flex flex-wrap" style="gap:1rem;">
<a href="#URL"><img src="https://fakeimg.pl/99x56?text=stamp" class="m-0"></a>
<a href="#URL"><img src="https://fakeimg.pl/99x56?text=stamp" class="m-0"></a>
[.. repeat for as many images as desired]
</div>