@jonbar123, it’s something, and that could work. My concern is that running twice a week might not offer enough consistency to bring about the running improvements you’re seeking. The best runners run often, just like the best swimmers and cyclists prioritize their particular focus above all else. It doesn’t sound as though you’re looking to become the best runner you can be just now, but it does sound like you want to increase your running strength & stamina.
Perhaps you can gradually increase the duration of these twice-weekly runs and see some noticeable benefit, but I’m super hesitant to recommend speed work or related drills as a means to increase the demand of these biweekly runs should you hit a sticking point/plateau. Probably save that sort of training for a time when you’ve run more consistently for at least a couple/few months.
But by all means, give your approach a shot and see how things go. My personal experience with running infrequently has too often seen me get sore a couple times a week with little measurable improvements in my running capabilities, all of which took a bit of a toll on my bike workouts and recovery.