The is the Obsidian Publish service exactly for that usecase. (https://obsidian.md/publish), although it is paid. I'm sure there will be soon, if not already, an open source extension that allows you to do that.
Several people I know simply donate money to the Obsidian project directly. But I agree that paying for their publishing service is more a win-win. You help the project PLUS you get the publishing service. I will probably do that.
(and yell that I need this or that feature, that the service does not provide yet :)