Scrapebox used to do that with the Google Competitor Finder feature but it's returning errors now. It's been like that since Google started requiring javascript for any queries and Scaprebox confirmed the issue.
We have own checker but i can help you, if you wish!
Both site: and inurl:Is that just doing site: queries?
u have a telegram bot called speedy index, check that out.Is there a tool that can help me find out if domains—not individual URLs—are indexed? I need this for bulk uploads, like 5,000 domains.