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My case they sent me a letter to pay the fees for biometrics $85 and sent via webform

Yes because you didn't pay the bio fee with the rest you paid. If you pay it with the rest of the fees then you won't get a letter like that.
 
No, you don't have to pay another fee. Now you wait for the Biometrics Instructions letter once receipt of payment is received.
My spouse is currently waiting for his (VO: Accra).
I paid on May 7, have not yet received acknowledgment letter. How long does it take to receive biometrics instruction
 
Timelines vary from person to person. My spouse paid his Biometrics fee March 2021 and is still waiting for BIL. Patience is key.
 
  1. We started processing your application on May 13, 2021.
What does the above sentence mean?

thanks