If you need apps for your Apple Pencil, there are plenty of third party apps compatible with the Apple Pencil
Here's a long, but incomplete list of available third party Apple Pencil apps.
Adobe Sketch
Affinity Photo
ArtStudio Pro
ArtRage
Clip Studio Paint
Colored Pencils
Concepts
Inspire Pro
iBis Paint
Linea
Procreate
Pixelmator
Painstorm Pro
Medibang Paint
AutoDesk SketchBook Pro
Tayasui Sketches/Sketches Pro
Tayasui Memopad
QN X Pro
Notability
Bear
NoteShelf (1 or 2)
Notes plus
Notes Writer/(Pro)
Good Notes
Goodreader 4
uPad
WritePad
PDF Expert
Foxit PDF
Documents
Good Luck to You.