jakbysiedalo
Children can leave the country for schooling purposes, but only up to a year, no longer, or the naturalization clock resets.
If you've been granted citizenship, then you can leave the country and still get a passport.
If you leave the country while applying for citizenship - i.e. deregister with the aim you'll never come back (or as your other post indicates, for three years) then probably the process will end.
As a Swiss citizen you have the right to return to Switzerland at any time regardless if you have the passport. So yes, from the Swiss side you can leave the country when you have applied for the passport. No problem. However, you will need a valid ID to enter the foreign country. As your passport gets annulled there might be a short period where you cannot leave the country. Unless you have some other recognized ID suitable for international travel. Like a Swiss ID which expires at another date.
OP, you can go on holiday, but you can’t move away from Switzerland. You also need to be available for interviews etc.
Or are you getting naturalised and if so, what stage is that process at?
When you say leave, do you mean as a tourist for weeks, or for longer like years incl. deregistering?