Bl touch cant reach end of the bed

This whole print area can be probed with a probe at the nozzle X/Y position (strain gauge).

There are mechanical limits that can’t exceeded.

Let’s pick the data:

Bed size (from stepper_x/y): 235 x 209

Probe position: (from bltouch): 40, 7 so the probe is (from top) 40 mm right and 7 mm top of the nozzle)

Bed mesh is (from bed_mesh): 10,10 to 230,220

Bed mesh should be :  10 + 30,10 to 235,209 - 7
.                  :  50,10  to 195,202

To get this working, turn KAMP off. (BTW: You do not need KAMP on Klipper 0.12.0: Bed Mesh - Klipper documentation)

More on borders an limits here.