Girls, hello everyone. Such a problem: my daughter started sleeping poorly…

Girls, hello everyone. Such a problem: my daughter started sleeping poorly during the day, there's no deep sleep, I see that she wants to sleep, yawns, gets fussy and can't fall asleep, and if she does, it's only for a maximum of 20 minutes. Has anyone had this or any suggestions? What did you do? And in the evening it became very difficult to put her down, the schedule is messed up, it's just hard, I'm already morally exhausted. She sleeps well at night, wakes up once for feeding and then eats at 6 o'clock and falls back asleep again. Sleeps until 10 hours. But during the day... ?‍♀️