I found an older solution, but it didn't work and so here's the css to always show post actions especially if you use fof/reactions.
/* Force the container and the list to be fully visible */
.Post-actions,
.Post-actions ul {
opacity: 1 !important;
visibility: visible !important;
}
/* Ensure individual items like Reply and Reactions are shown */
.Post-actions .item-react,
.Post-actions .item-reply,
.Post-actions .item-like {
opacity: 1 !important;
display: inline-block !important;
}
/* Optional: Keep the ellipsis (three dots) menu visible as well */
.Post-actions .item-controls {
opacity: 1 !important;
}