As a Dutch citizen I would not normally be allowed to fly to the US at the moment from the Netherlands. However my 13 year old daughter lives there with her mother. Does this count as an exception that would give me permission to fly?
Yes, according to Proclamation 9993, there are exceptions to the travel ban for:
(iii) any alien who is the parent or legal guardian of a U.S. citizen or lawful permanent resident, provided that the U.S. citizen or lawful permanent resident is unmarried and under the age of 21;
Note however that it seems you may need to have ample justification of this, including your daughter’s passport or other proof of US citizenship, and proof of her being your daughter (a birth certificate, probably).
Some ESTAs and visas may have been cancelled so you may need a new one.
Some US embassies advise you to contact them before departure.
You should probably check with your local US embassy or consulate for any special procedure or advice. There are lots of horror stories out there.