So, when giving someone medical attention, you can hold the gauze, click the target repeatedly, and just swap through the bodypart picker to queue up an attempt at repairing each body part.
When repairing a Synth, you have to retry over and over until they’re completely repaired, so you have to pick a bodypart, repeatedly click until you see it’s repaired, change to next bodypart. Have it where you can queue the repair action and once started it continues until the limb is fully repaired, like how cades are.
Repairing a synth as engie is a big hassle- because you need a medical scanner to see what’s damaged, and although you can examine to see wounds, the synth would have to be naked to see the wounds flavor text, and they have no bleeding flavor text like humans do.