You don't have an option to record a laser pointer in a PowerPoint 365 presentation on the Mac.
You need to give the Mac version the same capability as the Windows. Also, you need to have instructions on how to do it with a trackpad.
Paul D commented
The laser pointer is needed to highlight and point out key sections of slides. Please, please, please add the functionality to record the laser pointer on a slide show. Absolutely critical. I am preparing lecgtures in lockdown and this is essential to guide students. I find it unbeliveable that this has been omitted from the Mac version but included in the windows version.