Hi there oras78,
Thanks for connecting with us in Apple Support Communities! We understand you're not seeing Ask to Buy requests when your daughter attempts to make a purchase. We're glad you're here, and we'd like to learn more to see how we can help.
To start, did you get a chance to try all the steps in the 'Check the Apple ID that you're using for purchases' and 'Review your Family Sharing settings' sections of the related article linked in blue at the top left corner of this page?
If you go to Settings > [your name] > Family Sharing, is Purchase Sharing turned on? If you tap on your daughter’s name from there, do you see that Ask to Buy is turned on?
Next, go to Settings > [your name] > Family Sharing, tap your name, and make note of the Apple ID that appears there. Then, go back to Settings and tap [your name] > iTunes & App Store; is the same Apple ID listed for Family Sharing and the iTunes & App Stores?
Let us know what you find, and we'll take a closer look from there.
Cheers.