PowerPoint now has an object called Cameo which is a camera of you, crop it, change shape, move or morph between slides, use it when you present online with Zoom or Google Meet or Teams.
I also go through Zoom's built in way to be in the slides and Teams' equivalent which works when sharing any content
Example files can be found here: www.xlconsulting-asia.com/youtube-files
1:43: Insert Cameo
4:39 Apply Cameo to all slides
4:35 Record with Cameo
5:30 Sharing Cameo on meeting apps
6:19 Zoom: PowerPoint as virtual background
7:05 Teams: Be in your content