H1B to F1
When getting laid off on H1B, one option is to apply for change of status within the grace period to F1 visa and continue your study and working journey in the US by using F1 - CPT.
H1B to B1/B2
In 2023, USCIS explained that while B1/B2 visa holders cannot work, foreigners can legally seek employment. You can switch from H1B to B1/B2 status if laid off, explore new job opportunities, and then arrange an H1B transfer with a new employer.
H4 to F1
H4 visa come with many restrictions, one of which is cannot work until the H1B holder start their Green Card process. Changing to F1 provides H4 holder not only the opportunity to get an US degree but use CPT to work and earn.
B1/B2 to F1
Are you contemplating enrolling in a U.S. institution while here on a travel visit? Rather than undertaking the journey back home, opting to adjust your status to an F1 student within the U.S. could significantly streamline the process for you.