FL22 is Mazda's Asian PHOAT AF that comes in 55/45 premix ratio and happens to be a green tint. Hyun/Kia AF is also an Asian PHOAT AF that comes as a concentrate and happens to use a green tint too. The biggest unknown about H/K AF is whether it is the same newer extended life AF as the Mazda (Honda newer Nissan blue) or the older shorter service interval PHOAT previously used by makers like Nissan and some others, even Mazda. Using Pentosin/PentofrostA2 green concentrate and Beck Arnley green AF specs and recommendations it would appear to be the latter. In which case using Nissan and Toyota (old LL red concentrate) after factory fill service interval would be, ~2 years/30k miles.
So imo, H/K AF concentrate would be safe to mix with or as a complete exchange/(flush) for FL22. However, to be safe you would want to go with the shorter service interval if you use it.
If you want a green tint long service interval PHOAT concentrate, not too many options. One is Motorcraft Specialty Green, but it can be very pricey. The other currently is PepBoys OEM brand concentrate in green tint. It's currently ~$22/gallon but sometimes goes on sale, recently at $14/gal which was a deal. At the regular price sounds high, but an equivalent oem premix would have to be ~$11gal to equal the PB OEM concentrate.