Possible I'd say yes.
One way to do it might be to have a page section with the first block a text block with your toggle text or symbol in it.
Then follow with whatever other block you want.
Then your CSS would hide all but the first block of the page section.
Then you would have some code like the following.
<script>
$( '.page-section:nth-of-type( 1 ) .html-block:first' ).click ( function ( ) {
$( this )
.nextUntil ( '.page-section' )
.slideToggle ( 'slow' );
} );
</script>
This is not a fully fleshed out piece of code. It is just one possible starting point.
If you were going to toggle all page sections then you wouldn't need the nth. If you needed only some then add more. Something like...
const selector = '.page-section:nth-of-type( 1 ) .html-block:first, ' +
'.page-section:nth-of-type( 3 ) .html-block:first';
$( selector ).click...
I tested this code out here and it seemed to work well.
