Is this what you want?

 https://addons.thunderbird.net/en-US/thunderbird/addon/emojiaddin/   I do not know if it will work with latest releases.

Yes, Thank You!! Downloaded and installed and have access to them.

I noticed there are other emoji add-ons. Can T-bird handle more than one set?

yes. I was glad to assist. The only concern will be whether other addons are compatible with current release.

Never mind, I got it to work (I think). I tried but couldn't to delete this reply.

Well, it showed up in the Add-on section, BUT it doesn't work. I click on one (tried different ones), but it doesn't show in the email. )-:

Add-ons aren't necessary for W10/11. There is a built-in option: Windowskey+.

If you mean those under the Emoji over the top right of the email compose/reply window, those aren't enough. My email friends use a variety of emojies which I'd like to have/use.

I looked for "Windowskey+" in T-bird, even used Search. Can't find it.

Windowskey+. (period) is a Windows command that works in any app (see picture).

Got it, thanks! 👍 😉

Some of these are in the built-in T-bird emojies. The add-on has *many* more.

Can I suggest that you show the command as <Window-Key> <.> That is, without the +. I think others like me might think that the + was part of the command. 😃