The possibility is that he was saving legs for the next couple of days, as he does apparently regret never taking a world tour breakaway win.
This obviously isn't a particularly likely goal but it might be worth rolling the dice for - he did beat some fairly decent riders on the way to the GB champions jersey in 2022 from a breakaway (and certainly he surprised me how well he rode).
I'm pretty sure Cav will want to finish the tour in any case, his efforts after missing the time cut a few years back are testament to that.
This obviously isn't a particularly likely goal but it might be worth rolling the dice for - he did beat some fairly decent riders on the way to the GB champions jersey in 2022 from a breakaway (and certainly he surprised me how well he rode).
I'm pretty sure Cav will want to finish the tour in any case, his efforts after missing the time cut a few years back are testament to that.