i've installed odoo ce 18, but the option of QRIS API Key and QRIS Merchant ID mentioned at the bottom here doesn't exist in my installation, 

(please google this for link, I don't have enough karma yet to post links)

18.0 fiscal localization odoo indonesia

I have followed the guide precisely from top, except I'm using OCA accounting

Any idea why, or is this tied to enterprise-only?

ln10_id exists in CE install, so I'd thought I might be missing some kind of requirements. The codes also has complete qris API commands, although I haven't tested it.