Adsense Ad Hook Alignment

I would be more inclined to use Elements, simply for the ease of maintenance.

You’re welcome

We do not have control over the ads, it comes with lots of CSS, and it might not be good CSS.

Give this CSS a try, if it doesn’t work, you will need to check with the ads provider:

.adsbygoogle {
    max-width: 100%;
    overflow-x: hidden;
}

There is no place to add CSS code in block level, add it to customizer > additional CSS:

@media(max-width: 768px) { 
.adsbygoogle {
    max-width: 100%;
    overflow-x: hidden;
}
}

The container block that the advert sits inside of, select that , and in the block settings set the alignment to Wide Width. This will allow the container to overcome the container padding. And then when the advert loads it should be able to fill the viewport width and be centred.

The parent container thats wrapping the Advert HTML Code.

Can you take a screenshot of the container alignment?

I made a modification to one of the mobile ads to simplify things.
See here:

https://app.screencast.com/GXOJoiqcVZ4Cl

The: Google Ad #2 (mobile) is now a plain Container block with no Layout, Spacing or Sizing.
This will make the Container fill the width of the viewport.
The only block setting is the Text Align Center. option.
This will center and “block” HTML as well as text.
The Inner Container block was removed.

This will make the Container fill the width of the view port and centre the advert inside it.
See if that works for you, if it does you can apply the same layout to the other mobile ad containers