Version 2.3.3-1 of biosig is marked for autoremoval from testing on Thu 16 Jun 2022. It is affected by #1010545. The removal of biosig will also cause the removal of (transitive) reverse dependency: sigviewer. It depends (transitively) on nvidia-graphics-drivers-tesla-470, affected by #1011146.
You should try to prevent the removal by fixing these RC bugs.