usepackage{tocbasic}

DeclareTOCStyleEntry[
  entrynumberformat=entrynumberwithprefix{figurename},
  dynnumwidth,
  numsep=1em
]{tocline}{figure}

DeclareTOCStyleEntry[
  entrynumberformat=entrynumberwithprefix{tablename},
  dynnumwidth,
  numsep=1em
]{tocline}{table}
newcommandentrynumberwithprefix[2]{#1enspace#2hfill}