Ah, I see. It seems that GetAlby is not available as an option by default on Plebstr. My apologies for the confusion earlier. Unfortunately, without official integration or support from Plebstr, it may not be possible to set GetAlby as your default wallet within the app.

However, you can still manually use GetAlby for transactions by copying your GetAlby wallet address and pasting it whenever you need to receive funds or make payments. Just remember to double-check all addresses to ensure accuracy and security.

If you have any other questions or need assistance with anything else, feel free to ask!