Interval for the control chain?

Hello together, I love a Mini R56 (One or Cooper) and am especially concerned with its weak points. If I have understood everything correctly, the control chain theme seems to be in the first place here. My question would now be whether there is a kind of change interval for the control chain in this series – similar to the timing belt – or whether the chain along with spanner+glite rails is driven so long, until it is noticed by unsightly noises A short background to this: I visited a One with 100Tkm, which I like well, but which is noticeable after the stand gas reduction at (at first unobtrusive) cold start due to noise from the right side of the engine. The steering chain will probably still be the first. How is all your experience to evaluate? Control chain after 100Tkm definitely due? Or maybe even “finger off”? Thank you in advance for a few tips VG!