I keep getting spam calls from the UK, i do not live in the UK. Online i found that Call Rejection/Auto Rejection is a feature some phones have to plain block calls from some countries for example. I have not found this setting on my phone, am i missing something or is it not implemented? Running Android 11 btw, in case that matters
If you enter your phone app and press the three dot menu, settings, call blocking & block list, then you can block calls but it's not a very good way of doing it. You could download an app like truecaller? I don't stand behind this company as they collect all your data, but if you don't mind, then it's a great app to get rid of unwanted callers.