https://www.matrixgames.com/game/armored-brigade

Armored Brigade is probably a good start. 4 minutes for artillery to aim, 1 to 2 minutes for shells to actually arrive, 10 minutes for air-support to fly in.

1 to 2 minutes to deliver commands to any particular squad (depending on how good their radio contact is).

Roughly realistic levels of arms, armor and penetration. Angle of shots and type of weapon (kinetic energy, such as APFSDS, or Chemical energy, such as M47 Dragon or HEAT rounds) are factored in.

Guided missiles, top-down missiles, fire-and-forget missiles. Etc. etc. Its not every weapon, but its a solid set of important weapons that probably cover a wide variety of possible combat situations.

Line-of-sight is simulated on an incredible degree: height maps matter, but so do trees (partially obscured), houses, and smoke grenades even. Line of sight is best at 12noon. Line of sight is worst at night, unless your squads are equipped with thermal vision. Weather (foggy conditions especially) can change things dramatically.

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The simulated soldiers/tanks aren't the best, but they're smart enough to run away during artillery barrages and hunker down. They'll seek cover on their own (and if you tell them a direction to defend against, they'll look for cover on their own too against that direction). Tank commanders "button up" during enemy fire (reducing their vision but likely saving the commander's life). Covering fire is therefore effective.

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The AI is okay. The AI runs into traps and ambushes, and never really figures them out. Still, good enough to get you the basics of strategy of each of these weapons.

Seeing the 3000m range of a tank vs the 150m range of a M72 LAW really demonstrates the bravery that those unguided anti-tank bazooka squads have.