Yes, there is a website that many users including myself use to generate images without ever having to use Discord apart from authentication.

It's a full blown web app with better options than the Discord bot, it has batch mode/select, remix, all upscale modes, works with every Midjourney engine.

They make it available to users who have generated more than 10,000 images as it's in alpha state and not able to withstand the load that the bot currently takes.

I believe after v5 focus they will make this web app public, but for now only a select few get to use it.

They warn users not to talk about it or share the link because they don't want it public until it's ready for full load which means over 10 million concurrent users.