De or het bandcoaching?

The correct Dutch article is:

de bandcoaching

Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) muzikale en creatieve begeleiding van een muziekgroep Een professionele bandcoach helpt muzikanten beter samen te spelen, te communiceren en hun podiumpresentatie of eigen geluid te ontwikkelen …

How to use bandcoaching

the bandcoachingde bandcoaching
this bandcoachingdeze bandcoaching
that bandcoachingdie bandcoaching
our bandcoachingonze bandcoaching
your bandcoachingjouw bandcoaching
every bandcoachingelke bandcoaching
which bandcoaching?welke bandcoaching?
a big bandcoaching / the big bandcoachingeen grote bandcoaching, de grote bandcoaching

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).