FFVII Remake Save Data Unlocks Summons in FFVII Rebirth - Siliconera

Players who have save data from Final Fantasy VII Remake will be able to unlock Leviathan and Ramuh summons in Final Fantasy VII Rebirth.

Aerith Gainsborough, Final Fantasy Wiki

Final Fantasy VII Remake Summons guide: all summons and summon materia locations and unlocks

Characters of the Final Fantasy VII series - Wikipedia

Final Fantasy 7 Rebirth Still Arriving This Year Despite Silence from Square Enix - IGN Daily Fix

I Think Heroes Of Ruin Is The Only Loot Game Where Friendships Level Up - Siliconera

FFVII Rebirth: Why Your Remake Save File Still Matters!

News Archives - Page 75 of 90 - Siliconera

Save data doesn't carry over to Rebirth but you get summons : r/FinalFantasy

Final Fantasy 7 Rebirth Crafting System, Parry, File Size, FF7R Save Files Will Receive Summon Materia and More Details Revealed

Final Fantasy VII Rebirth Will Use Your FF7 Remake Save Data in an Interesting Way - One More Game

Aerith Gainsborough, Final Fantasy Wiki