Once set up properly, most of the drivetrain can go quite some time without much attention.

The tubeless tires, if they're actually set up tubeless, will need some regular sealant checks to make sure that the sealant is still good (it should be the consistency of half&half, or thereabouts) and that you have enough of it (it can dry out over time and some of it also gets used whenever you get a puncture, many of which can go unnoticed). I would check it in a few weeks (sometimes new tires will absorb a good amount of sealant), top it off to the right volume and then check again 6 weeks or so after that. Once you get a feel for the rate at which you/your tires go through sealant, you can adjust the frequency of your checks. A tubeless sealant syringe (10-12 bucks on Amazon) is a great investment for this, though you may need to replace your valve stems (not all of the valve stems have the internal clearance to pass the tube of the syringe).