8 month sleep regression - never ending

We were lucky to have a baby which slept through the night from 3 months onwards. No sleep regressions, that is, until 7 months.

She’s now 9 months and we are still having a hard time in getting her to sleep through. No end in sight. All sleep training attempts have failed.

Initially she was waking up every hour and only sleeping on us. Now she wakes up between 12am to 3am and just won’t let us put her down. It’s unsustainable and seems like nothing is helping. She will sleep on my shoulders but as soon as she senses we are putting her down she screams.

Schedule wise she’s waking around 7am. First nap at 10, second at 2 and bedtime at 7pm. So 3/3/4.

Any tips or advice? We are struggling. This has been going on for about 7 weeks now.