EB1 A can work in different fields other than endeavor

USA H4
1

EB1 A applicant should work in the same field or can work in different field?

2

I travelled on H4 in May 2022
I got EB2 NIW approval in May 2023
Applied EB1 A in August 2023 on my Ph.D in Electrical Engineering (Non IT)
I also got lottery based H1B (IT) approval in December 2023
I worked for 6 months.
My question is Can I work in different field (IT) when my EB1 is under process ?
will there be any credibility issue with my H1B?