I guess as she consumes more solid food and other liquids, she'll turn to the breast less often and your milk supply will naturally dry up without pain.
If you are happy to let her nurse to sleep in the evening I suspect she'll guzzle at this late evening feed so she could be on for at least an hour until she's satisfied and sleepy. Do the 'dead man's drop' before trying to de-latch: pick her arm up and let go. If it drops undisturbed, then she's totally asleep. If you lay her down in her cot asleep she may, if you're lucky, sleep through the night. A breast feed night and morning could be enough and still give you that special closeness. My DCs used to have a feed around 6:30 pm then tuck in again around 10 pm.
I'm happy with night time oddly. I rarely feel so strongly then.
I don't know if this is fact or an old wives' tale but I heard our milk at night is richer as we've been resting and so babies will feed more often at night. Imo babies at 6 months still require at least one night feed, bf or bottle.
Btw when they reach 6 months, try introducing a soft cuddly piece of blanket or toy for DC to snuggle up to at bedtime. It acts as a comfort object so make sure the comfort object is there every time you settle DD for sleep.
When you want to cut back on the bf, say around October, start bedtime a bit earlier. You and DH can take a turn at reading her a story after a feed and before bed. Then both say goodnight, hug and put her down - it'll get her to accept a bedtime ritual - making sure her comfort object blankie or toy is there with her. We kept the bedroom door a little ajar so ours didn't feel utterly shut away.
If she does wake, it won't necessarily be for food, you'll probably be able to tell from her cry if she's hungry or not. Leave the landing light on to see by. If she's just wakeful, whether it's you or DH, don't instantly take her out of her cot, keep the light off and don't talk too much. Sit by the cot with your hand on her to soothe her.
Tbh I missed the sleepy cuddles!