How the fuck is it acceptable to completely remove the jack and replace it with this 'superior' technology?
But the answer is no - they advertise 5 hours.
Or you could just buy a different phone. It's their product, what is "acceptable" is up to them.
(Yes, the first part is sarcasm.)
Edit: Looks like you wanted to say this, but made a typo.
Both the airpods and the case can be charged together.
If you want to listen to 6+ hours of audio straight, then you'll have to use something else.
Making people get into the habit of always putting them back into the case when not in use should also reduce the likelihood of loosing them.