Will a new employer know that my H1B was terminated?

[ignoic]

I got fired after I had an interview with a new potential employer.
I did not inform that I was fired after but will they find out in the process of H1B transfer?

Should I inform the new potential employer that I got fired https://vlc.onl/ ?

H1B transfer has not been started and my current employment has been terminated at USCIS.