.wp-block-post-navigation-link .wp-block-post-navigation-link__arrow-previous{
display:inline-block;
margin-right:1ch;
}
.wp-block-post-navigation-link .wp-block-post-navigation-link__arrow-previous:not(.is-arrow-chevron){
transform:scaleX(1);
}
.wp-block-post-navigation-link .wp-block-post-navigation-link__arrow-next{
display:inline-block;
margin-left:1ch;
}
.wp-block-post-navigation-link .wp-block-post-navigation-link__arrow-next:not(.is-arrow-chevron){
transform:scaleX(1);
}
.wp-block-post-navigation-link.has-text-align-left[style*="writing-mode: vertical-lr"],.wp-block-post-navigation-link.has-text-align-right[style*="writing-mode: vertical-rl"]{
rotate:180deg;
}
All system for education purposes only. For more tools: Telegram @jackleet