Do I need to visit immigration for a 60-day extension on my marriage visa during the COVID extension period?

So you're saying your last entry was mid January and when this shit storm started you didn't think to bounce out and back again in early March to get a NEW 90 day stamp on a visa that is unlimited entry?

I personally do NOT believe you're covered on the amnesty until the 30th so you have 3 choices:

meet the financial requirements and get a yearly extension based on marriage to a thai

get a 60 day visit thai family extension based on marriage (which doesn't require proof of funds)

get the letter from your embassy and go get the unable to travel due to covid-19 extension for up to 30 days

CHECK with your immigration office before thinking you're covered until the 30th on the frree auto-extension amnesty dealy.

you should be under the automatic covid extension, but nobody knows what the next announcement will be,

Advice is to get the 60 day Extension of Stay and see what happens in the next 2 months