Can I get another 45-day stamp upon re-entering Thailand after leaving for Penang?

I just did my 2nd same day border bounce yesterday to Cambodia in a row both trips 45 days each from Pattaya

Yes till 31 march

I think you can get unlimited 45 day stamps if traveling by air

2 is the max, if traveling by land.

Did you have a return flight booked ?

Correct me if I’m wrong. I thought you had to be out of the country to apply for a tourist visa?

Hi Fiona can i ask how long it took to obtain your 60 day visa in Penang?

You can try. Nobody, except the immigration officer, can say if you'll be allowed in.

Have you had any Covid extensions ever? Ever overstayed in LOS?

Were you ever on an education visa before??

Best to have the 3 proofs in any case:

hotel booking for a few days & onward travel reservation within the number of days you're allowed , & 20,000 thb or equivalent in $ £ € in CASH is needed.

If your re-entry is on/after April 1, people may only be allowed 30 days...

yes you can