Can't get buttons to stick to bottom in query loop + button width

I knew there had to be a reason that "is_home" was in there...and there is. Two read more buttons everywhere on the home page, without it. LOL. Always something.

SO...the PHP code that works is:

add_filter( 'wp_trim_excerpt', 'tu_excerpt_metabox_more' );
function tu_excerpt_metabox_more( $excerpt ) {
    $output = $excerpt;

    if ( has_excerpt() ) {
        if(is_archive() || is_home()) {
            $output = sprintf( '%1$s <p class="read-more-container"><a class="button" href="%2$s">%3$s</a></p>',
                $excerpt,
                get_permalink(),
                __( 'Read more', 'generatepress' )
            );
        }
    }
	
    return $output;
}

And the CSS to make it all happen:

.gb-inside-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.gb-inside-container > *:last-child {
    margin-top: auto;
}
.generate-columns .inside-article {
    display: flex;
    flex-direction: column;
	height: 100%;
}

.generate-columns .inside-article .entry-summary {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}
 .read-more-container {
    margin-top: auto;
}

An interesting lesson in how *sometimes* someone else's code isn't quite what is needed. Or something like that. ;) Anyway - thanks for seeing this through. Now back to converting WP Show Posts sites...

haha glad it's working now :)

That's why we ask for users' sites, as everyone's site has some different something.