Hi @carln90164570,
Thanks for reporting this. I tested the same workflow on my end using Illustrator 29.8.1 on Windows and was able to paste vectors into PowerPoint without issue. To help isolate what might be causing the problem, could you please try the steps in Safe Mode and see if the paste works there: https://adobe.ly/3JX3gfq. This will help rule out any third-party apps interfering with Illustrator or the clipboard.
If the issue persists, it would be really helpful if you could share a short screen recording showing your complete workflow from Illustrator to PowerPoint, so we can check further.
Looking forward to your update.
Abhishek