Just in case, you will be not able to late check in this appartmen, there is no any self checkin and Pietro can support you only till 12 p.m.
I didnt note that and booked this appartment, after communication with host we realised that we have too late checkin for host(3 a.m. because we have night flight).
Host didnt give us any support in this issue and just forward issue to Airbnb, of course Airbnb give advice to book a hotel for one night and the result of this problem we spent additional money for one night in hotel. Never was in situation like that, but will be accurate in future and I whould like to share my expirience with other travelers.
Also other hosts provide all instruction and important information after booking into direct messages or in English n description of appartment profile, it's very useful and you have time to solve problem like that.