Sleep!

Do you breastfeed?

I wouldn't use any products. I'd look at the whole days routine first and adjust.

What time does she wake, nap and go to bed?

Wakes around 7ish, ideal naps are 9.30ish, 1ish and 4.30ish then bed around 7pm but it doesn’t always work out that way. She will work incredibly hard to avoid napping sometimes! She’s also recently started wanting to sleep on her side with her face smushed into something or face down

How long are the naps?

If having a nap at 4.30 even for just half hour then 7pm bedtime is too early.

Wake windows you want to start with the shortest and get longer as the day goes on with the longest before bed (at least 3 hours).

I'd try something like:
Wake at 7
Nap 9-10
Nap 12.30-1.30
Nap 4.15-4.45
Bed 7.45

We found settling her in cot instead of in arms then placing her in literally gave us a 6 hour stretch first night we did it. Then make sure awake and resettle in cot if wakes in night too. No leaving to CIO just rocking and shushing in the cot instead of in arms so when she half wakes it’s where she expects to be

Not sure if it properly works yet as just three days in with it but I'm trying the sweet sleep magnesium butter from a brand called sweet bee. Just rub a small amount on the sole of the feet and calves around 20 minutes before bedtime. My LO usually wakes around every 2 hours but has the last two nights extended to around 3-4 and less false starts. I also use it on myself and find I drop off easier as well as not waking up constantly during the night checking on her or anticipating her wake ups. But I'm just three days in so not sure if it's that or something else 😅

Not sure if it’s an option but I’d co-sleep.

The wake windows on that day feel a little mixed up as youve got
2hrs 15
2 hrs
2 hrs 45
2 hrs 30

The lengths are fine but for a better nights sleep I'd be looking at them starting with 2 hours and the last being 2hrs 45.

You may find that bedtime can stay the same but the naps adjust. The other option is just start pushing bedtime by 5 mins or so at a time.

Yeah her waking is for the breast as you say and I don't think any products will help. I think when you stop breastfeeding sleep improves massively usually, there will still be bad nights though. When breastfeeding I introduced a new sleep association (patting bum) before bed I then latched her off before she fell asleep and put in cot patting bum. Then I stopped BF around 9 months as she was waking like 12 times a night and I just needed to sleep. I was able to pat her bum to sleep. She's nearly two now and sleeps through most of the time, I just st hold her hand whilst she falls asleep. You could also try cutting the last nap out and go to bed a bit earlier. And try gently sleep training by resettling her in cot or introduce a new sleep association like I did.

No advice but just here to let you know months 4-6 was absolutely brutal when it comes to sleep. I went through the same thing as you. It got a lot better at 7 months. Sometimes they just need to outgrow it. I didn’t do anything special