I would wait to see how badly Reform councillors perform and when the first of them get challenged by elements like Trade Unions , increased Council Tax bills , mismanagement and reduction of public services , etc , etc. There will be chaos in those councils where they have control.
I would concede Farage could become Leader of the Opposition at a long shot but FPTP will deny him an election win. Even if he did achieve LotO , any incumbent PM would quickly take him down and make him the laughing stock he is.
This is just a flash in the pan moment like Nick Clegg.