A couple of email signature generators I have used before
MySigMail
Signature
Editable for 30 days but active forever
MySignature
https://mysignature.io/preview/147e220ae8b3dc499981
The free version only allows 1 social icon
Hubspot email signature generator
https://www.hubspot.com/email-signature-generator
WiseStamp
Has branding that you can remove manually.
htmlsig
If you need to generate an html signature for your email then this is a great site https://htmlsig.com/
Make sure you don’t close the window or you’ll lose the data you entered.
I’d suggest creating a document to store the data the site asks for as it is useful to have on hand.
Stay away from these, they ask for details only after you’ve entered your details or the free edition is so limited as to be useless