In 5.181 I have added a new option "Try to merge into lines based on screen coordinates".
When you combine this with \nas join character, it might work as you expect! It tries to find lines based on the coordinates.,
Additionally when saving to a variable, BTT will now make a secondary variable with "-coordinates" suffix available that contains JSON describing the detailed layout of the recognized text
Here is an updated preset:
ocr-keyboard-shortcutv2.bttpreset (6.3 KB)
//edit: 5.181 joined in the reverse order 5.182 should fix that