Yes.

Once you have this Non Immigrant O visa, you can apply after 60 days for the Extension of Stay based on being over 50 years of age.

For this the money needs to be in a Thai bank account on your name for at least 2 months prior application until 3 months after application date and rest of the year not less than 400.000 Thb. Pattaya Immigration can ask you to come back 3 months after you have this Extension to show your bank book again.

To apply for a conversion of your Visa Exempt Entry into a Non Immigrant O visa based on being over 50 years of age there is NO seasoning of money required.

There must be a bank letter that the money is on a Thai account on your name and a second letter that the money came from abroad.

Until the date mentioned on the Visa as valid until or enter before. After that date the visa is not valid anymore and a new visa is needed.

If the person use an Extension of Stay based on marriage with a re-entry permit, you have to use this before the valid until date, otherwise a new visa is needed.

In Bangkok people can apply during the last 45 days.

I would say, get all documents ready, have the proof you have to leave 1 may and give it a try.

The BOI has a one stop offices in Bangkok and several region investment and economic centers. If you have any question about the paperwork contact them.

There is a conversion possible from a Visa Exempt Entry or Tourist Visa and the normal extensions for these into a Non Immigrant visa at your local Immigration Office.

BUT to do that, the Immigration Office must have permission to perform visa conversions

The applicant must meet the requirements like 21 days days left on the admitted until stay

The employer must meet all the requirements.

So only advice possible is: Talk with your employer, visit together the Immigration Office and ask.

I guessed you life in Bangkok, this is the hand out with requirements:

@Mark ********

Correct

As you have an official stay inside Thailand and a permit to re-enter again there is nothing you have to do about visa.

You have to meet the requirements for the Thailand pass and other covid precautions but that is not part of this group.