I think if you gave us some simple answers it would really help. I am sorry to hear that your parents died in such quick succession, it must be very difficult for you.
Did your parents transfer the ownership of the farm to you 30 years ago. Did ye use a solicitor to formally put your name on the folio as title. Have you been the farmer since, with you doing all the returns to revenue & the dept of ag, yearly, in your own name.
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Or, now that I re-read your original question, did your parents say 30 years ago, when we are both dead you will get the farm. Which then leads to the question, did your father die in 2024 and leave everything to your mother, who died in 2025 and has left everything to you? So there are two wills and you are now preparing for probate? If this is the case you will have to pass the farmer test now, not 30 years ago.