Will I face issues entering Thailand after leaving without an exit stamp?

I’m just wondering..

On some Immigration forms - like the TM7, asks for your last date of entry (and place).. While you would know that, as I recall, for all of my past extensions, I’ve always been asked to provide a photocopy of the passport page that has that entry stamp on it..

To be fair, other forms that ask for your TM6 card number, are largely overlooked as they know, there are, at present, no more arrival cards being issued to air arrivals.

Wonder if this is how it will be for the entry stamp as well…

No issues at all

"No exit stamp" wouldn't be an issue travel-wise. Your departure record is on the system. That is the electric gate is for.