Love Stuck (2024)

Both are movies in which the ML is trapped in some odd form of time (a loop vs. non moving time) that he thinks is just him until he discovers the FL who is experiencing the same thing. Ultimately, it's revealed that the FL triggered it due to a health-related thing that makes her unable to move on.

FL and ML are stuck in the same time loop. It's supposedly the worst day of their life but instead of trying to escape the loop, they choose to make use of the time loop and do as much things as they want together as they can while falling in love.