Bug report

[bre7]

Just a couple of fixes for the script:

Messages aren't found if already in spam "folder".
The hyperlink formula is incorrect when using some locales (; instead of , as formula separator.)

function doGmail() {
    // ...
    var threads = GmailApp.search(`label:${label} in:all`);
    // ...
    var hyperlink = '=HYPERLINK("#LINK#"; "View")';
   // ; is universal apparently and will be converted when needed https://stackoverflow.com/a/61283851/2124535

[mimedico]

Do you enter your label or email address here in step 2?

https://a.cl.ly/YEuBkEDp

[bre7]

I did. The issue is how GMail filtering works.
The repro for the bug is quite simple.

1. Label an email that's tagged as spam.
2. Try using label:REPLACE_WITH_LABEL_NAME
   Email won't be displayed in search results

Try using label:REPLACE_WITH_LABEL_NAME in:all instead

[RainofTerra]

Applied this to my local version of the script and it worked great, thanks!