Thanks Anil for creating this Post. I would like to share my experience here @ Canada Detroit Windsor Tunnel border during Covid-19 Pandemic.
Background: I have recently renewed my Passport inside US ( Chicago Indian Embassy). My I-94 was given only till old passport expiry date ( June 15 2020). Hence I had to get new I-94 to stay further inside USA. Due to Covid-19 Pandemic and international travel ban in place, I really had tough situation. Anyhow, finally I made it 
Date: May 13 2020
- I have called CBP Windsor Tunnel office as well as Canada Windsor border agency and explained my situation. Both officers agreed to let me Enter the Canada border and take a U-turn and Re-enter into United States to get the New I-94.
- I drove into Windsor Tunnel to cross Canada and officers sent me back to the US side ( Just a U turn after interviewing me in detail. Border Non-Essential travel ban in place)
- Upon arriving at the CBP check-post at US side, officer interviewed me and I gave a I-94 request form ( I had filled this form in CBP site with my old passport detail and paid $6 and printed it. Site won’t allow to enter new passport details, because VISA is tagged to old passport)
- CBP officer directed me to park the Car at filed officer parking lot and let me enter the CBP building.
- CBP officer inside the building, asked few questions (normal POE interview) and issued me a New Paper I-94 slip to my new passport)
- I checked the I-94 site and my arrival record is tagged to my old passport number and dates are valid till my VISA expiry.
P.S : Canada US border Non-Essential travel restrictions in place. Canada officers won’t let you pass the border check-post. But they still allow you to take a U turn and re-enter.
I had called Otay Mesa, San Ysidro in San Diego and both places they have agreed to renew I-94. But they told me I have to cross the border and Re-enter and it is valid even though Mexico US non-essential travel restrictions in place. Laredo border office also agreed to do renewal, but there is a travel restrictions in place for other state travelers entering into Texas. I live in Michigan, so I chose this option. Reply to this post if you have any questions.
Good Luck guys. Stay Safe.