If it’s just to reduce eye strain, and not to reduce myopia, then my recommendation is to use an in-between glasses.
Back when I first attempted to reduce my myopia (in 2002 or so), I learned all about the ciliary muscle and closeup causing myopia. Since then I’ve owned PC glasses, about 1 diopter weaker than my full prescription. That places the focus distance about 30cm behind the PC screen (without active focus).
This nearly completely eliminated most of the headaches I had at the time.
For years I’d have the TV behind the PC screen about 3-4 meters away so I could watch both. The pc glasses were strong enough to see the TV well enough, and weak enough to keep eye strain away for the monitor. In this way my eyes were stable for 15 years prior to my current myopia reduction attempt, and I was relatively headache free, compared to before then.
So of the goal is to reduce eye strain, your setup is great, just use a prescription that puts the relaxed eye focal plane behind the monitor 30-50cm or so. If, however, the goal is myopia reduction, my original comments stand