Assalamualaikum! I lived in Al Ain and also left in 2020.
I started vaping in 2016 when it was banned to import vaping stuff. I got around the flavor issue easily.
I’d go to the post office and then customs would open the package in front of me. It was always local ladies, btw. They would always ask what they were. I always told them the truth, that they were food flavorings.
The first few times I opened a couple of bottles that I knew smelled like the name such as lemon or strawberry. I’d tell them to sniff it and they always did and a look of recognition would appear. A couple of times I’d put a drop on my knuckle and lick it. Then I’d offer it to them. They’d never do that. But then they’d close the package and say "khalas’.
I was asked a few times what I did with them and I told them my wife taught cooking classes to her friends. They liked hearing that.
So, you can try the same. The truth is they are food flavors. Now, I don’t know about Tunisian law but in the UAE if something was haram they’d just confiscate it which they did to a few mods. Maybe they’ll do the same there.