Hi!
During lockdown a number of people with hybrids, including NXs and RXs have had issues with the hybrid auxiliary (the 12v) battery running down due to non-use. However, as long as the battery is well charged up before it's left (eg. A long journey to the airport, or good use in the days preceding), it should be fine for at least a fortnight. People have reported they have not had issues leaving them at airports under normal conditions. The problem with lockdown is that people aren't doing significant and frequent journeys. The 12v only needs to have enough juice to get the hybrid system to READY mode, it doesn't have to be able to trigger a starter motor. In a nutshell I'm saying don't worry about it, if you're aware of the potential for a problem you should easily be able to counter it. Personally the battery on my 2019 NX although discharging has still started the system up after no use for over a fortnight.
HTH
In every other respect, don't forget these are Lexus... More reliable than any other make!