Zone 2 & VO2 max plans letting me pick bike or run as I prefer on the day?

Hello, sorry if this is a bit daft... I've been using Wattbike and TrainingPeaks for a few years and just been following set plans on Wattbike app or TrainingPeaks around also doing 2-3 days of weightlifting p/week.

I'd like to continue doing the weightlifting and improve my Zone 2 and VO2 max through running and wattbike.

Ideally I'd like the flexibility to choose on day of each workout if I'm running or jumping on the wattbike if I'm pressed for time.

Are there plans I could buy that cater for this type of training and choice flexibility or this asking too much?

A difficulty I'm also having is that much of the terrain where I run is hilly so trying to keep heart rate low for Zone 2 is sometimes walking vs. running, which often breaks the plan when a plan is set around a target pace.

Cheers for any help or suggestions!