TN/TD visa --> I-485, I-765 and I-131 (EB2 NIW I-140 pending)

Hi Redditors,

We are Canadians currently in Canada. I have pending I-140 application under EB2 NIW. My fiance (soon to be wife) might be relocating to the US for work and will be on a TN visa. I may have the option of joining her on a TD visa. I know that I am not allowed to work on a TD visa. I have a few questions:

1. If we enter the US on my partner's TN/TD visa, are we allowed to file I-485, I-765 (EAD) and I-131 (Advance Parole) concurrently while my EB2 NIW I-140 is still pending?
2. I have heard that once we file an I-485 application, my partner will not be able to renew her TN, but we will be allowed to remain in the US on the existing TN/TD visa until it expires?
3. If my I-765 and I-131 are approved while my EB2 NIW I-140 and I-485 are still pending, will we be allowed to work and travel? Which visa would I be on at this point given that I am allowed to work?
4. What is the current processing time for I-765 and I-131?
5. Assuming my EB2 NIW I-140 is approved while we are in the US on a TN/TD visa, are we allowed to file for I-485, I-765, and I-131 right before our TN/TD visa expires and remain in the US even after our TN/TD visa expires?

Thanks in advance for your help!

submitted by /u/CanadianResidentDoc
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source https://www.reddit.com/r/immigration/comments/oun0l8/tntd_visa_i485_i765_and_i131_eb2_niw_i140_pending/