For historical reference.
Put a 1kg roast into the instant pot for 60 minutes and about 15 minutes depressurize time. It wasn’t enough.
Put it in for another 20 minutes and zero depressurize time. It was like shoe leather. Maybe put it in for 70 minutes total next time?
New veggie rack worked out great with some potatoes and carrots. Actually, the carrots were a little hard after the 60 minute mark as well but were fine after the 20 minutes.