Yes! The BIOS has an option to logically disconnect the battery, and it will only work when plugged into a charger when that’s on. It does require a reboot to access though.
EDIT: I’m kind of curious what this feature will look like with the Framework 16 because they’ve stated that their new 180W can’t supply all the power it needs at full load. Either it’ll be disabled or they’ll leave it in and let people cause power issues unless they use bypass with a 240W adapter.