General Nonimmigrant Visa

I'm currently on H1B Visa with I-140 Approved. My Employer is sending to Canadian branch to work for 2 years. I have 1 person reporting the work to me (Offshore India). I'm not designated as a Manager. Upon return to US branch after 2 years completion in Canada. Does my application qualify for EB-1C category?

My boyfriend is applying for his F1 Visa in July 2020 for fall semester 2020 for his MS in Finance at one of the US universities (deciding on which one right now). This is a question asked well in advanced so we are fully prepared.

I am planning to sponsor Visitor Visa for my sister,she was diagnosed with Down syndrome when she was 1 year and she is now 45 yrs old.
Considering her condition, i would like to know what additional documentation is required for visitor Visa B1/B2 apart from I130, letters to consulate & bank statements.

My partner is a teacher and was granted a J-1 visa on September 25, 2019. We've been together under one roof for 5 years and undergone the rite of Holy Union since same-sex marriage is not honored in the Philippines. I would like to seek advice on the best possible way on how to go to the US. Should I still push through with the J-2 visa application or as a tourist or visitor?

I am on H1-B and I lost my job 7 days back. I have I-140 approved with Priority date 2015
Do I need to inform USCIS that I lost my job and I am searching for job ? if yes how and where ?
How many days I stay in USA and search Job ?
My I-140 was approved 8 months ago and now my employer said that he will revoke it , what will be impact on me after he will revoke it I-140 ?
Am I able to extend my H1-B, once he revoke my I-140 ? ( my H1-B 6 years are completed)
If I will go back to India and search job from India, can consulting companies transfer my H1-B in this particular situation ? or I will face complication ?