Each Battalion sized entity should have a AD troop.
AD Regiment should be a stand alone Regiment Responsible for the overall AD plan of the Brigade, training of the Brigade. And long range AD coverage.
Each Battalion should have their own AD Troop for short to medium range protection. Each Platoon sized should have short range AD assets available immediately.
If you are with a LAV battalion then you get a LAV SHORAD system, with a man potable system.
The Avenger style system might be pretty effective against these smaller sized drones attacking Company sized assets. I think we the ADATS turrets are still in storage. Maybe dust those off as a basis and modernize them a bit and mount them on a LAV chassis and put them to work.
Canada has a few companies who specialize in Counter drone systems. Detecting, jamming and can have systems to neutralize the threat added. I would hire those companies and have them build us a good program and process. Then integrate it into our current equipment.
I am not sure what the elevation of a LAV 25mm can go to, but maybe mount a stinger system to the turret, modify the max elevation of the gun, add a radar system and add air burst ammo to the drum. Use it for drone defence.
Someone is going to say you cant do that, or its just not that easy to mount a radar, integrate a control system into the turret to fire a missile and make the gun elevation go higher.
Drill a hole, run wires, install a bigger generator/ alternator, run a few more wires. Zip ties work for temporary mounting of screens, wires etc. Cut a hole, add a actuator and voila you have a working model to build upon.
(or give the parts to the Ukrainians/ Poland and ask them to build it, they seem to be able to make things work in quick order).