My parents arrived in the USA for 3 months initially, but because of COVID they had to file for an extension for their B-2 stay. They filed for the extension in April and they are waiting on USCIS to give a decision on the B-2 extension.
While they are waiting for a decision from USCIS, can they travel to Canada or Mexico? If so, what does that mean for the B-2 visa? Can they get another I-94 with an extended date?