Engineer would be liable for any fault leading to injury or death just like with fire, so I would refuse to do any of it without correct training.
Plenty of jail sentences and fines in the news... Also insurance for the company is higher if you add gates to your services, either specialise and train correctly for it or sub IMO.
Gate-safe is one path of training, which is a ECS discipline.
https://www.hse.gov.uk/work-equipment-machinery/powered-gates/safety.htm
https://www.hse.gov.uk/safetybulletins/poweredgates.htm
https://gate-safe.org/
As above suppliers will have their own scheme but it's going to be based on their supplied kit.