Hi. Do all the S60s use a manual tensioner?

I helped someone in BC Canada buy a Canadian 2002 S60 2.4 turbo sedan with under 100K kms (>60K miles). Don't know the engine code.

The shop recently changed the timing belt and water pump (preventative) as a pulley was noisy. Unfortunately, they won't provide a copy of the invoice although the service manager gave a summary of what was done (front brake rotors/pads, tune-up, oil change, flush power steering and coolant, top engine mount, front stabilizer links).

Also, a CV boot is leaking a little and it's due for a front wheel alignment.

As 120K miles is the service interval - is it likely the shop reused the tensioner or can it only be used once?

There was no mention if the serpentine belt was re-used.
Would the interval be the same as for the timing belt?

What is that service note about the interval being every 45K miles after 1st change?

Does the water pump last as long as the 850 ones (up to 210K miles).

Should the transmission fluid be changed every 60K miles or so?
I note that it should be Mobil ATF 3309.

Thanks.