We can filter the ads that comes out in the gadgets of our kids if we want them not to see any of these. But it depends also on which content that the kids are watching nowadays. If they're the contents that are just for kids, I think they're just fine and there is also the YouTube kids that they can use so that each ad is filtered there and probably no gambling ads are going to come out from there. What we have no control is the national tv that we are sure that we've seen some ads popped during tv shows and when they're on the ads but these kids don't know what exactly these gambling ads are.
I am still of the opinion that ads that only last but for a few seconds has little to no negative effect on our kids more than what we allow them watch on their gadget, and my number one question also have always been why the hell do we parents even allow our kids gain access to gadget in the first place? And not only did we allow them access to this gadget, we also allow them access to the gadget with internet connection, why the hell are we then complaining about the effect gambling ads has on them?
If it shows only for few seconds and won't be repeated, I'm reckoning your opinion with that and they're probably no impact to the kids. But I don't think that most ads are only going to pop once to the ads or banners when these kids uses their gadgets. Because typically, they'll be shown for several times per day or even a week and sometimes months too. But these kids shouldn't really use these gadgets but if the parents has no choice, they should be regulated.
In my place, there is this common saying that "it is he who the river sees that it swallows", what does this mean?, it simply means that if we don't allow our kids access to this gadgets, and also stop them from watching programs that are not meant for kids, then we will not be discussing about the effect gambling ad has on them kids.
I agree on this but these ads are in every place and we're not holier than thou that we won't allow kids to even watch in TV or play with some gadgets. Parenting now has evolved and different in the past. But if there are parents that don't give their kids screen time, kudos to them.