cannot return non-composite value from function returning composite type

declare
  new_count bigint;
begin
  
  select reaction_count into new_count from public.reactioncount
  where parent_id = new.parent_id and 
  reaction_value = new.reaction_type;
  new_count = new_count + 1;

  update public.reactioncount 
  set reaction_count = new_count
  where parent_id = new.parent_id and 
  reaction_value = new.reaction_type;
  return new, new_count;
end;