Canon EOS M50 Mark II Advanced User's Manual page 301

ISO Speed in [
ISO speed is set automatically. For details on ISO speed, see
Recording.
Note
You can lock the exposure (AE lock) by pressing the <
AE lock, press the <
Exposure compensation in manual exposure movie recording can be set in a range
of up to ±3 stops.
ISO speed, shutter speed, and aperture value are not recorded in movie Exif
information.
] Mode
> button again.
301
ISO Speed in Movie
> button ( ). To cancel