This is in the works 😉
Boost For Lemmy
Community of the Android app Boost for Lemmy
🎉
~~You can do this without logging in.
I do not think you can use your login elsewhere without transferring your account to that server. ~~
You can have multiple accounts with the same username on different servers.
Edited as I was confused. This question is regarding Boost, not in general.
How do I do this without logging in? Is there a way to change what server the "guest" account comes from?
First, allow me to apologize. I didn't realize this was the Boost forum. My directions are for opening a web browser and looking from there.
Here is the homepage for Beehaw. I have had good luck setting the top of page options, then bookmarking. This will save those options.
I will install boost now and update my answer if there is a boost specific method.
In Boost, the default guest is from lemmy. World, which is displayed In the upper left menu at the top. I do not think this is changeable.
Via a web browser or is clear the home pages are subtilty different.
Likely, this is the price of a nice interface.
In Boost, the default guest is from lemmy. World
For me the guest account uses sopuli.xyz, the same instance my account is on.