And when you turn to reporting one or both changes, Form 5500 part II line 4 and the Instructions for it (page 18) state details about how to report a change in the plan’s name or a change in the sponsor’s name.
The format recognizes that either of these names might have changed when the other has not.
https://www.dol.gov/sites/dolgov/files/ebsa/employers-and-advisers/plan-administration-and-compliance/reporting-and-filing/form-5500/2024-form-5500.pdf
https://www.dol.gov/sites/dolgov/files/ebsa/employers-and-advisers/plan-administration-and-compliance/reporting-and-filing/form-5500/2024-instructions.pdf