Flat deductible rate for work related meals & transportation in ZG

Hi! In VD it was possible to deduct a flat rate for work related meals & transportation, ie. for meals it would be just the number of days (with a certain max) and for transportation it would be the distance in KM multiplied by a certain rate. Deducting factual costs was also a possibility, but just as an alternative.
Is my understanding correct that in ZG a flat rate doesn’t exist and only factual costs can be deducted? I’ve been exploring the guidelines and for now I’m not finding anything about flat rates.
Thanks!