A simple Google search would tell you she did not record a bridge for the track and he had to add one in.
Also, it definitely sounds like a background singer vocal layer on the 2019 edit. It's not her main vocal track.
“With Britney, I still have to work with her," he told Official Charts. We started with the main part [of the song] but I’ve added a bridge to it, so as soon as she’s free we have to finish that.
"She’s difficult to get in contact with! One thing I noticed is that the singers themselves are so involved these days. One of the problems with working with Britney is that now she’s so busy - for example she's in Vegas - and she has contracts that say she can’t do certain things. She cannot do a video because of I don’t know exactly what. It’s different from the way I used to work."
Asked how the collaboration came about, he explained: “I spoke to her on the phone. She called me and told me she wanted to do the song – it was her idea and she wanted to do it together in the studio, but unfortunately I was in Europe.
"I heard the track and I only changed a little bit – she did a good job with it actually. I hope she finds the time to do the little bridge – it’s just eight bars. I’m going to meet her soon and tell her!"https://www.officialcharts.com/chart-news/britney-spears-did-a-good-job-with-collaboration-giorgio-moroder-reveals__7868/