Just wanted to add my hand to hold OP. I'm also EBF 9wo DD2, she was mix fed to start with due to severe tongue tie.
We're having exactly the same constant feeding, clingy, worse daytime sleeps. She's discovered her hands and is desperately working on keeping them in her mouth but gets very frustrated when they won't stay there!
Mine sleeps brilliantly at night - I've got a cosleeper cot with a sleepyhead in it. However, she is DC3, and I can tell you that sleep is more down to the baby than anything you do.
DS was my worst sleeper. EBF for 10 months, waking every hour to hour and a half every night. At 10 months we switched to formula, and his sleep didn't change a bit.
When I was mix feeding Dd2, she didn't go any longer after a bottle than she did after a boob, so don't let your DH fall into the trap of thinking that bottle = longer is a given. Obviously, it's fine to give a bottle if you want a break from one feed, but don't do it expecting her behaviour to change.
You sound like you're doing a fantastic job 