There are anuber of tag cloud implementations have a search on google “tag cloud tiddlywiki” eg https://groups.google.com/g/tiddlywiki/c/VQPaJC6yyWM/m/B2pS_FgXCgAJ
\define calcFontSize() font-size:calc(0.5em + (0.2em * ($(count)$ / 5) ) );
<$list filter="[tags[]]" variable="thistag">
<$vars count={{{ [<thistag>tagging[]count[]] }}}>
<span style=<<calcFontSize>>>
<$link to=<<thistag>> tooltip=<<count>>>
<$text text=<<thistag>> />
</$link>
</span>
</$vars>
</$list>
- See how this does all tags, you could start with a single tag or for each tag on current tiddler.