When new alert is started with courser on a block, to fill in the block content as a mesage
(BTW, that's the only reason I've not being using WB Alert so far)
When new alert is started
By "started" do you mean when creating a new alert?
EG:
Yes, indeed, I meant when creating a new alert, it starts with a cursor on a block to fill in the notification with the block content. And I believe this is a common need. The common use case would be to do it over a TODO block so that it's not missed but the task is also in context and reused for other things, which won't be the case if it is done as an alert only.
If the cursor is currently on the block, that would mean a user could Select all and Copy relatively easily.
macOS
Select All: Command + A
Copy: Command + C
Paste: Command + V
Windows
Select All: Ctrl + A
Copy: Ctrl + C
Paste: Ctrl + V
Would this suffice?