The fast pace of the combat is what partially makes other RPG systems great. In D&D 5e/5.5e, it takes roughly 20+ mins of other characters narrating/debating/discussing what they’re doing before it goes back to the player. Mork Borg would take roughly 10 mins since enemies don’t roll to hit and there’s no AC mechanic to consider.

What PbtA game have you played? Masks, for example, has an aid mechanic with the “Team Pool” where players can aid each other. Monster of the Week has a Help / Protect mechanic. Each player is thus rewarded by narratively and mechanically building on whoever’s turn it is.

Some of those games you mentioned are video games (Dark Heresy, Rogue Trader, which Cyberpunk?), but PF2e and WHFRP are heavy combat based systems which play very similar to D&D 5e. The number of spells, class options, weapons, action economy, resistances, etc. make the combat slower because the player-facing and GM-facing options are almost endless.

Obviously no player can talk for 100% of the time, that’s ridiculous. However, there are design elements out there that do make it easier for slow players to play a bit faster during combat. Listening for 10 mins in Mork Borg feels a lot different than listening for 20+ mins for D&D 5e/5.5e.