“commited” is not “currently used”. It is summary of reserved and used.
This overview in Taskmanager say mainly nothing about MSFS. You can made a more detailed check related to MSFS with the Resource Manager.
You can also see, that you have 43GIG cache ( I see same in longer flights ). Most of them is normaly nothing else as available memory, just the summary of cache of different ‘things’. ( empty this manualy was years ago a little trick , e.g. see )