Sorry, I think options like Firefly III for that might not be sufficient for small business, but it was the only great Foss personal finance software for a long time.
Odoo is the gold standard for business. I think they also have a business finance app? It isn’t free, but the cost is reasonable.
Otherwise, I use Leantime for project management. If you work in a project-based or contract-based company (like consultancy or design house), then it has a lot of project & product features including time tracking with a plugin. Not financial though.
Joke
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You
(Context: Most companies including Nintendo claim that any act of piracy is a lost sale, which is completely a lie)