I think you are mixing the terms fairness and justice with what goes on in a political / legislative process. This is mostly a battle between the interests of Meta and Google vs. ByteDance.
They started as separate bills in the House with a final step of merging them into one before sending off to the Senate, as I understand it
Even if they were technically separate at one point, the discussion leading up to and throughout was about them as one. The Senate passed a bigger bill that also included border funding months ago. That was rejected by the House without consideration or negotiation, because reasons...
Regarding "fairness" of bundling, I agree with others this is the wrong framing. Democracy and politics is about giving and taking to get something not perfect through a messy system full of competing interests.
Each congress critter voted on each bill separately.
Even if they were technically separate at one point, the discussion leading up to and throughout was about them as one. The Senate passed a bigger bill that also included border funding months ago. That was rejected by the House without consideration or negotiation, because reasons...
Regarding "fairness" of bundling, I agree with others this is the wrong framing. Democracy and politics is about giving and taking to get something not perfect through a messy system full of competing interests.