Would love some advice on my program!

Been lifting consistently for six years. I've incorporated running into my training recently but I feel like I'm leaving endurance gains on the table. Would love some feedback to see how I can improve. For context, I lift in the morning, and run after work in the evening. I'm not by any means fast in terms of pace so I train purely through heart rate at the moment.

My objective is to get faster. Currently 13min/mile is my zone 2 and my threshold pace is around 9:30min/mile to 10min/mile.

Monday: Upper & 40-45mins zone 2 run

Tuesday: Legs

Wednesday: Arms and Shoulders & 25mins zone 2 run

Thursday: Chest and back & 40-45mins zone 2 run

Friday: Plyometrics & leg rehab

Saturday: Either one of the following: Long run, intervals, or tempo.

I don't do another long run on Saturday if I just did it the week before. So it's never the same stimulus on every Saturdays.

Maybe what I'm doing now is perfect and I just need to be a bit more patient to see results. But as a new runner, I guess I seek the validation to know what I'm doing now is correct.

Any and all suggestions welcome! 😄