Under these extreme pressures the electrons will be pushed between protons again, i.e. their shielding effect would apply there more than inside the sparse plasmas.
Still you have e.g. 1 electron per proton - concentration of electrons increases proportionally to concentration of nuclei.
Maybe it could reduce average proton-electron distance let say from 100pm to 10pm ... while the most costly in fusion is going from e.g. 1pm to 1fm - where this screening from electron cloud becomes just negligible.
Again, the only option for non-negligible electron assistance is that there is a single electron remaining between the two colliding nuclei.