@Members_7hMo5hd: Hi there. I hope you're well, and enjoying your S21 Ultra. If you open the Camera app and swipe over to More, you'll find all available camera modes here. Please be aware that time-lapse is available, and is called Hyperlapse, while Macro shots can be achieved by getting within 10cm of a subject, after which the camera will automatically adjust itself. I hope this helps.
Hyperlapse and time-lapse are slightly different things
I'm enjoying the camera and yes I have looked in the more section but as I said in OP there could be so much more