Always happens. A commitment to achieve some climate goal in the future isn't even worth use as an buttwipe. There need to be serious consequences for failure that go above and beyond the worst-case theoretical cost of the commitment.
It's literally nothing. Only ACTUALLY decarbonizing is worth a damn.
And to be clear, offsets in ANY form don't count either. The Paris commitments are to get to ZERO carbon. The only way it makes sense for a country to sell an offset is if they sell that offset at an equivalent price to what it will cost you to get rid of your LAST ton of CO2. Since the offsets aren't nearly that expensive, we know they are load of total bullshit. They're fraudulent. Double or triply so for non-national exchanges.
Carbon removal can count, but the legit research is almost always worse bang for your buck than just fucking decarbonizing.