I started commuting recently with an soon to expire H1B visa stamp + new I-797 for amended petition. On the first trip, I was asked to park the car and go inside the office to get the I-94 from I-797 stapled and stamped to the passport (up to validity of I-797). On the subsequent trips so far, only one or two questions about where was I going and surprisingly also a light joke from the officer this morning. I would be happy to answer any questions for those who are looking to commute in the future. On the return trip, remember ArriveCAN.