As for the string “day/night”, it will be made translation ready in next update of the plugin. Similarly as for the string “Read more”, we are unable to find such string so please mention about which “read more” string you are referring to so that we can help you.
PS: we have translated the string using the Loco translate plugin.
I have a similar issue: https://prnt.sc/ixhrwt
I cannot find these strings in the translation file. The class of the span for the days is class="wp-travel-trip-duration
for the rating it’s <span class="rating-count">( 0 Reviews )</span>