Canon EOS R50 Advanced User's Manual page 143

Note
When ISO Auto is set, you can press the < > button to lock the ISO speed.
If you press the < > button and recompose the shot, you can see the exposure
level difference on the exposure level indicator compared to when the < >
button was pressed.
Any existing exposure compensation amount is maintained if you switch to <M>
mode with ISO Auto after using exposure compensation in <P>, <Tv>, or <Av>
mode ( ).
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