Planning to buy 2020 CX-9

As the title says i will check a 2020 cx-9 tomorrow from a dealership here in Canada and a bit hesitant due to the coolant leak issue.

My solution was to buy an extended warranty (powertrain) from the dealership. anyone did the same? Just curious if it’s a good idea or if it’s really something will save me from the future.

116,000 km
2.5L turbo
AWD
12 documented service records
Accident-free CARFAX
Good oil-change history
$25,950 cash