Have you flown this route before? I'll see if I can remember and document the entire process but some of it may be things you already know and I might be mistaken.
I have flown from Riyadh once since the new rules came in, about 2 days after they were enacted.
At check in you were informed of the rules and asked to confirm you had nothing that breached them in your hand baggage. The exit passport and security checks were no different to usual.
At the gate the queuing is as bad as ever with poor management of the status queues (particularly as First is often next to WT/WTP and the opposite side of the gate to Club and the staff attempts to improve flows always seem to make it worse).
Once through the boarding pass (and ID) check, there is the usual "random" selection of people for swabbing of bags and shoes but you then progress down the jetway where the streams are divided into female (door 1) and male (door 2)
On the jetway were two people doing a bag search and holding up any devices (mobile phones etc) to a template printed out and pinned to the wall so it can be clearly seen that it passes or not.
Following the bag check was a frisk search to identify any other devices in your pockets etc - anything suspicious had to be removed and examined, and any electronics held up to one of the templates again.
As you can imagine this took absolutely ages - the gate opened 45 mins before scheduled takeoff and doors ended up closed almost an hour after (this was a Thursday evening flight which is generally the busiest).
The flight crew were clearly unhappy with the whole thing and apologised but said they wouldn't say anything more (fundamentally as there was nothing they could say).
They may have improved the process since, but realistically there is no place in the departure area to add in the process so it can only really be done on the jetway and then there are obvious further size and throughput restrictions.