Toddler struggling with sleep

Anyone else struggling with their toddlers sleeping?

She’s 20 months old, as soon as she hit 18 months it’s been a struggle.

It’s harder for her to fall asleep, she’s waking at night, I’ve tried putting her to bed earlier she just wakes up more through the night. The lack of sleep is affecting her through the day (constant yawning, rubbing eyes, clumsy, whining etc) but I can’t seem to get her to catch up on sleep!?

Any advice?

(No she’s not teething)