Based on the information provided whilst provisionally authorised for the UK Trader Scheme it appears you will not meet the establishment criteria in the future.
If on classifying your goods and reviewing the tariff, you have determined they are zero rated, you would be able to declare these goods as not at risk. You would need to ensure you checked the tariff regularly to ensure the duty rate has not changed on your goods as they do get updated often.
Further information on declaring goods as not at risk can be found:
Check if you can declare goods you bring into Northern Ireland not ‘at risk’ of moving to the EU