Gutenberg InnerBlocks with ACF Blocks – How to enable multiple buttons?

if you have a look at this site:
https://developer.wordpress.org/block-editor/reference-guides/core-blocks/#buttons

You can see that “Core/Buttons” (plural) only supports “full/wide” on “align”. You can however use “align” => “center” on “core/button”.
I don’t know how you can add multiple buttons inside “core/buttons”, but you can however add multiple “core/button” inside your template:

[ 'core/button', [ 'align' => 'center' ] ],
[ 'core/button', [ 'align' => 'center' ] ],

Hope this helps!