€90 is the standard figure they have used for years.
If you earn more and can prove it, paper work, bank statements, app statements etc etc you could push for more but remember that you will also have to take maintenance, fuel, wear and tear, freight, insurance costs, and all other associated expenses out of the figure you claim you are earning, IE, if you can prove 200 a day through an app, you pay 12% commission, probably €10 on fuel, 13.69 a day for insurance(based on you being a renter and paying 5K) wear and tear on car, tax liability on that figure you claim etc etc