Seeds are over a decade old. Got them in the seedling starter tray with dome with heat mat underneath. Started the seeds in March.' Not a single head poking out of the ground...C'est la vie
If they're that old, then some might not germinate, or take their sweet time. May need to consider buying new seeds. You should be able to get a couple packs from a good vendor for under $10 if you need more.
I bought them from @TexasHotPeppers , but I don't think Garth is active here anymore though unfortunately since he hasn't replied to any DMs. I'm willing to pay @Voodoo 6 , let me know what's available. Or if you are willing to ship a few seedlings my way that'd be cool.
or just call it bad luck and move on.