I have experience with F² Poncirus hybrids. F² zygotic hybrids are generally more variable in form than F¹ hybrids. Some are monofoliate and approach Citrus in appearance, others are nearly indistinguishable from Poncirus itself. At least one of my F² hybrid selections appears to be a Poncirus tree, yet when it's pollen is applied to Meyer lemon flowers quite a few of the seedlings are predominantly monofoliate indicating it's Poncirus X Citrus hybrid status.
Photos of 2 such selections that are cold hardy to -12°F (-24,5°C). These exhibit strong Poncirus characteristics, yet 026 produces many monofoliate seedlings when it's pollen is applied to zygotic Citrus flowers.
My recollection from the past is that both of these make acceptable beverages when diluted 20/80 with water and sweetened. To the best of my recollection 026 is slightly better in flavor.
Photos of Conestoga 026 fruits and juice which appear quite similar to your fruit. I can only speculate that there may be similar genetics involved.