Hi @MIKE 130
With Aufenthaltserlaubnis 19d you are entitled to Kindergeld.
The relevant legal basis is paragraph 62, section 2 of the ‘Einkommenssteuergesetz’:
https://***.gesetze-im-internet.de/estg/__62.html
That section lists certain types of residence permits that do not give an entitlement for Kindergeld. For others, such as 19d, there is an entitlement.
If there is any written response from the Familienkasse denying you these entitlements, you just need to refer to this legal basis.
This article (via online translation) gives a good overview on the rules around family benefits for people with 19d:
https://***-nds--fluerat-org.translate.goog/leitfaden/16-aufenthaltserlaubnis-qualifizierte-geduldete-beschaeftigung/familienleistungen/?_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp
Best,
Éanna