I don’t think there’s a way to trigger the save outside of actually saving the post to get ACF to do it’s thing.
If your looking to get a list of fields, if you know the group_id for the field group in question you can use:
acf_get_fields($group_id)
That will return a the list of fields, then you could loop through that list of fields to get the information for each field type and get the data based on that.
EDIT: I mean the group key, will look something like “group_123456789abcfef”
