Hi OP, I think you are worrying about the wrong stuff. 10 mins is fine. However, there are a few dynamics here that may be worth looking at and being open to rethinking.
first, it sounds like it’s all a bit routine and automatic- maybe try mixing it up.
and yes, if sex always starts with you getting your 10 minutes, lying passively until you come, I can see that feeling like a bit of a chore. Do you need to always get that first?
then you sound strangely disconnected from the actual sex. Sex ideally would feel mutually enjoyable. Perhaps if you’ve come already then your excitement level is pretty low and it all sounds like it gets transactional - like, yes you’ll do different positions, but it’s basically for him so he comes quickly knowing that, and you are already basically done. It doesn’t sound that satisfying for either of you.
My DH and I got into a bit of a routine at one point- always starting with oral for him, then sex, and finishing him off. Then if I wanted it (and often I didnt because Id be tired) oral for me. It wasn’t his intention but it all started feeling very routine and a bit unfair.
I’d mix it up. Maybe he can go down on you to get you turned on but for a shorter time then you have sex that feels more exciting and mutual, then he can finish you if you like…. Or you start with oral on him, then sex, then oral on you…do something to surprise yourself - eg initiate in a different room in the house or at a different time or starting with a different configuration.. or whatever….
right now, your routine does sound a bit disconnected - like you passively receive yours then basically check out a bit?
The most important thing is don’t go into a spiral of self doubt or defensiveness. Take this as an opportunity to have a fun, sexy brainstorm with your partner. What would he love to experience sometimes? What would you? Have some fun!