How can I successfully apply for a Covid extension for my tourist visa in Thailand?

Quick report on Covid extension at Phitsanulok Immigration.

I was on a 30 days tourist visa extension until April 8th. Applied for a Covid extension on March 30th, before knowing that the police order was extended and I could have waited. Anyways, all turned out very well. I got an under consideration stamp, told to come back on April 9th. I went there today instead, trying, because I'm planning to be somewhere else on the 9th. Got the stamp. Best thing: they didn't give me 60 days from March 30th, but from April 8th. Permitted to stay until June 7th. Cheers!