Yes
The show only appears to mention their names thrice throughout all of the seasons. The first is when Daenerys visits her dragons where she had locked them up but no indication is made to which is which.
Daenerys Targaryen: Viserion? Rhaegal?
Game of Thrones, Season 5 Episode 1, "The Wars to Come"
The second time is when her and Jon meet on Dragonstone and she tells him about the reasoning behind their names. Again no mention is made to which is which.
Jon Snow: Amazing thing to see.
Daenerys Targaryen: I named them for my brothers Viserys and Rhaegar. They're both gone now.
Game of Thrones, Season 7 Episode 3, "Queen's Justice"
Lastly, in Season 8 Episode 4 Tormund is asking Jon how he's going to get to Dragonstone, Jon says by horse as Rhaegal needs to heal. At this moment in time Viserion has become Vicerion and has died twice so only Drogon and Rhaegal are left.
Tormund Giantsbane: You're not gonna ride the dragon south?
Jon Snow: Just a horse. Rhaegal needs to heal. He doesn't need me weighing him down.
Tormund Giantsbane: You weigh as much as two fleas fucking.
Game of Thrones, Season 8 Episode 5, "The Last of the Stakrs"
