Scans.

I draw on big paper, usually 11×14 Canson ‘Mixed Media.’

I scan my watercolour and ink drawings on my big ol scanner (an Epson Workforce WF-7820).

I might leave them as-is, or move them around a bit in Procreate so I can isolate images easier. I can also make some minor corrections there when needed, though it's best to not fuss too much. A digital inkline here and there is fine, but too much and it looks out of place (which it is!)