My understanding of NOOBS (and PINN) is that the OS selection is based on the partition order on the SD-Card and as such cannot be changed.
My recommendation is never to use multiple operating systems on one card in anything other than dire emergency or for testing / playing as its to easy to loose / damage / wear out a card through heavy use and it takes much much longer to recover.
My second recommendation is to stop using NOOBS A.S.A.P. as (I believe) development has ended (even RPF say to use the new imager) and move to PINN as this gives a significantly larger functionality (inc backups / restores / copies etc).
The closest ways I can think of doing this in PIONN would be:
- Use the 'sticky O/S' function. This stops the PINN menu showing and jumps direct to the selected OS (but still supports the 'shift key' functionality to get back to PINN
- Use the PINN command line option partition=< part number > to force boot to a given OS if nothing is selected from the start up screen
- PINN will boot to the last used OS by default so just wait a little while