What Are the Implications of Resigning from a Job on a NON-B Visa During Amnesty in Thailand?

Hello! I have a question regarding the NON-B visa and the amnesty extension.

My boyfriend is looking to resign from his current job, which would mean his work permit and visa would be cancelled and typically would mean it's time to leave the country to sort out something else.

He is from Myanmar.

1. Since there are currently no flights and since his current visa would normally expire after 26 March, we assume he would be covered until 31 July under the amnesty extension.

2. We have seen some reports stating that Myanmar (and other neighboring ASEAN countries) citizens are allowed to stay in Thailand until a) borders open and b) until 30 November. We are planning to call the Myanmar embassy/Thai immigration to verify this.

Can you please provide some advice or insight into what would currently happen if he resigns and his current NON-B visa and work permit are cancelled?

Thank you!