An interracial family adopts a pair of kids with special powers from an orphanage, and sets out to help each of them find their one remaining parent.

Who is the main character? What is the story’s inciting incident that happens to either him or her?

I see, the natural question then is; Why two protagonists and not one? In what way does having more than one MC help the story?

The chain of events feels add-hock and the events themselves seam lacking a relation to each other.

By this I mean “…gaining special powers…” doesn’t flow logically in the world of the story on to them getting adopted and to motivate them to “… locate their remaining biological parents,” and “…evade capture from the agents that gave them their powers.”
For this chain of events to make perfect sense and leave the reader wanting more (as you can see from the logline) this story will need a lot of explaining. So if much explaining is needed in the logline this is indicative of the script having much explaining (likely exposition or direct address VO briefing etc…) as well. In story explanations = boring so best to reduce it as much as possible.

Also there have been many super power movies and specifically teenagers gaining super power movies at that. This means that you would need to work harder to make a kid with a super power original and interesting.

I recommend specifying the exact power the kids have because “super power” comes across as a generic description. This will help make these characters unique also best to relate the super power to their goal and give them an inner journey that relates as well.

e.g:
After an orphan with a fear of abandonment is made a clairvoyant by a secret government agency, he with the help of his new adopting family must find his parents whom he senses are alive and in trouble.

Putting the biological parents in “trouble” adds a ticking time bomb element and raises the stakes as well.

Hope this helps.

I still don’t understand the need for a dual protagonist as it doesn’t add to the story.

“Having two unrelated kids get adopted by the same family creates a much bigger strife potential,” – I don’t see how.

“…but also shows the power of family in a much bigger way.” – I don’t see how this is the case either.

I strongly recommend focusing on a single protagonist plot it is hard enough to structure as is already.

Your latest draft of the logline is better but still lacks a clear cut cause and effect relationship between the kids and the foster families avoiding capture.

“…the show is about family and the love of a family.” – if so then make the family the goal. If the kids already have a loving family in form of the foster family and still decide to go after the biological parents they never knew then the story is about biological relationships and not necessarily family.

I’d change my original logline recommendation to:
After an orphan with a fear of abandonment is abducted and made a clairvoyant by a secret government agency, he senses his parents are alive and in trouble he must break out of the agency and find his parents before it is too late.

If it is about two kids and a family the support network available to them is greater. They are safer and have more resources at their disposal ultimately it is less interesting as the chances of success are higher this way.

Make it a single protagonist with no family and he or she want to get a family (as the show is about the love of a family they want so badly) also make them young and make them go out into the world on their own to do this and the stakes go sky high.