Entered US and not on a project yet

[Sonny]

I am on H1B visa and have an approved I-140. I have some questions on my situation. I was working for CompanyA and I left US in April 2022 and went to India and my employer CompanyA relieved me in August 2022. Thereafter I transferred my H1B to another employer CompanyB in May 2023 while I was still out of country and did not work for CompanyB while in India and have I797B. Now I have entered US in January 2024 since my employer CompanyB had a project for me. But CompanyB has still not assigned me on a project and neither submmited I-9 form. In this situation what can I do, can I transfer H1B to another employer Company C? And what are my options ? Also a note my previous employer CompanyA H1 is valid until June 2024.

[h1bsponsor2024]

yes you can Transfer H1B to Another Employer (Company C): Since you have a valid H1B visa with CompanyB