re: "Clients won’t be able to view my recorded answers in the speaking section of the test?"
Clients can NOT see or hear answers to ANY of your test questions.
The only thing anybody might be able to see (based on past experience with my own profile page) is this:
If you have a Duolingo badge on your profile, they'll be able to link to it and see your SCORE.
Although I just looked at my profile... and the link to the score is no longer there, nor is my Duolingo certificate showing any longer... Although my English "certification" note shows up...
So right now, this is the ONLY thing that anybody can see: