Indeed, from the way Jada confronted Ryan in the first place, it seemed like she had found out that the hacker had found out about her secret baby, and assumed Ryan had been digging for blackmail material on her and learned about it from the hack, when it was the other way around.
The impression I got is that Jada assumed Wayne Enterprises had hacked her company's data for business reasons. She was surprised in the final scene last week when Ryan said her interest was personal instead. I don't think it ever occurred to her that it could be about the daughter she gave up until Ryan dropped the bombshell on her. After all, she's this hugely successful billionaire, all business. She even treats her son like an employee. So she'd naturally assume the hack from another megacorporation was some kind of dirty business trick and never even consider that it could be about the daughter she's spent a quarter-century trying to forget.
The time jump to the following day (beyond giving Marquis an opening to crash the meeting) is a nice place to assume that off-screen, Ryan provided corroborating evidence or that Jada looked into it in the meantime and verified that the baby was named "Ryan Wilder" and that this Ryan Wilder wasn't some kind of imposter or substitute.
But it seems odd to gloss over that in the story, never even to raise it as an issue. The impression is that Jada just uncritically accepted Ryan's claim, and that feels out of character for someone in Jada's position. It's a narrative oversight that it wasn't at least acknowledged. Whether you can fix a plot hole after the fact is irrelevant, because that's not that hard to do. The problem is that the hole exists in the first place. It shouldn't be left up to the audience to explain these things; that's the writers' job.