“…A man is informed he has one year to decides to do everything on his wife?s bucket list to maximise their time together, but she is to sad to enjoy the experience…”

According to the logline he has one year to decide. Is this the film going to be about him deciding? It would be better if the story follows him completing the bucket list.

That said, this is very/too similar to The Bucket List. The husband and wife relationship seems like the only distinguishing element.
What’s stopping him from completing the whole list? Where’s the conflict going to come from?

This reads like an original premise for a romantic comedy – I’d watch it. A rom-com about an assassin who falls in love with her target – that’s a great tagline and will likely grab the attention of decision makers.

The inciting incident is her falling in love, whether she falls in love in act one and realises it only in act two it’s still the inciting incident, so your instincts were correct in starting the logline with that.
As with all good love stories,? the nature of whatever is keeping the lovers apart will make the story interesting. It would be best if you described the antagonist in your next version.