@owenwint22 Nothing to worry about. The device will get hotter when charging and using power intensive apps, when downloading large files and using a lot of data for instance. That temperature is certainly not excessive though.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB One Ui 5.1,Android 13 .