perl, though that uses lists rather than multiple value or fixed-size tuples:

  #!/usr/bin/env perl
  use v5.36;
  
  sub f($a, $b) {
    return ($a+1, $b+1);
  }
  
  sub g($k, $l) {
    return ($k+1, $l+1);
  }
  
  say for f(g(1,2));

prints out

  3
  4