Are they precut? Sapele is very difficult to cut with the laser, it chars a great deal.
If they’re precut and you just want to engrave them it’ll come out nicely, Sapele engraves nicely, very dark. You’ll want to use a jig to align the precut invitations.
The bottom line for me is that I’d avoid trying to cut Sapele. I’ve had nothing but trouble with it. Engraving would be fine — time consuming, but fine.
For more info search is your best friend:
https://community.glowforge.com/search?q=Sapele
Corner jig example: