M Mann

Hi,I am currently on h1b visa which is valid until Sep 2022 and I have my I-797 approval notice but my visa is not stamped (I don't have any H1 visa stamped on my passport). I have F1 visa stamped on my passport which expired in 2019. I am planning to travel to Canada and comeback within 30 days. So can I use automatic revalidation to enter USA on an expired visa with my I-797 and I-94? Also I have completed a DS160 application and I am actively looking for appointments in London and Canada, Will it be considered as pending visa application and will it be treated as exclusion of Automatic Revalidation status. Thanks