The screenshots look to me like half smart spreadsheet, half automagic admin ui on steroids. And I mean this positively, that's really rather impressive looking.
Nocodb is great, however I think it doesn't support Firestore. We are build on the GCP/Firebase stack and deeply aim to solve for all the pain points of Google Cloud ecosystem.
NocoDB works differently than rowy, we transform ANY existing MySQL/Postgres/SQLite into Airtable like spreadsheet.
Github : https://github.com/nocodb/nocodb
Docker : docker run -d -p 8080:8080 nocodb/nocodb