If the new categories are just added values in an existing column, your report should pick them up automatically — provided there aren’t any filters or formulas that limit what's shown. I’ve seen similar cases while working with businesses that rely heavily on Crystal Reports for operational visibility.
At Peterson Acquisitions, we’ve worked with teams reviewing legacy reports, and often it’s not the data source that needs changes — it’s the formulas or suppressed sections inside the report that block new values from appearing. Definitely check any selection formulas or conditional formatting.
As for scheduling — if you're not changing parameters or the report structure, your existing schedule should continue running just fine.