@Drefolks In the Uk it is illegal to share calls with 3rd parties without consent, see some information here https://www.gmal.co.uk/recording-phone-calls-on-your-mobile/
Anyway the facility was removed due to privacy/security issues. whilst there are 3rd party apps many will have restrictions. Raised many times, one thread here https://eu.community.samsung.com/t5/galaxy-s21-series/uk-phone-usage-restrictions/td-p/5598519
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 5.0,Android 13 .