In looking more into that list, it only tracks players from teams who used instat which was limited to GA teams that were playing and a couple ECNL teams. It's basically worthless as a tool to evaluate the depth of elite club soccer.
Here is the current U-17 national team where no club had more than 2 representatives and there are players from 16 states:
Mateya Dessieux (Tophat; Knoxville, Tenn.)
Sonoma Kasica (Florida Premier FC; St. Petersburg, Fla.)
Aven Alvarez (North Carolina Courage Academy; New Hill, N.C.)
Elizabeth Boamah (Albion SC; San Diego, Calif.)
Jordyn Bugg (San Diego Surf SC; El Cajon, Calif.)
Nicki Fraser (Real Colorado; Highlands Ranch, Colo.)
Reese Klein (Florida United SC; Cooper City, Fla.)
Hope Munson (Utah Avalanche; Salt Lake City, Utah)
Tanna Schornstein (San Diego Surf SC; San Diego, Calif.)
Carla Small (IMG Academy; Waipahu, Hawaii)
Nawreen Ahmad (Virginia Union FC; Falls Church, VA)
Kendall Bodak (New England FC; Monson, Mass.)
Shaela Bradley (Portland Thorns Academy; La Center, Wash.)
Isabela Engle (Minnesota Thunder Academy; Edina, Minn.)
Claire Hutton (World Class FC; Bethlehem, N.Y.)
Neely Kerr (Tophat SC; Buford, Ga.)
Linda Ullmark (Western New York Flash; Buffalo, N.Y.)
Emeri Adames (Solar SC; Red Oak, Tex.)
Sophia Bradley (PDA; Wayne, N.J.)
Ava McDonald (FC Dallas; Allen, Tex.)
Miri O'Donnell (FC Bay Area Surf; San Ramon, Calif.)
Jaden Thomas (FC Dallas; Dallas, Texas)
Amalia Villarreal (Michigan Jaguars FC; Lansing, Mich.)
And here is the current u-15 national team where no club had more than 2 representatives and there are players from 15 states:
Evan O'Steen (Solar SC; Grapevine, Texas)
Liesel Tetmeyer (Sting Austin; Round Rock, Texas)
Pearl Cecil (San Diego Surf SC; Encinitas, Calif.)
Natalie Chudowsky (New York SC; Westport, Conn.)
Izzy Dalke (St. Louis Scott Gallagher; Belleville, Ill.)
Makenna Holub (Eastside FC; Redmond, Wash.)
Michaela Panella (Western New York Flash; East Amherst, N. Y.)
Mia Villalpando (San Diego Surf SC; Bonita, Calif.)
Vienna Whipple (Crossfire Premier SC; Bellevue, Wash.)
Scottie Antonucci (Legends FC; Rancho Cucamonga, Calif.)
Reese Canada (Michigan Hawks; Fenton, Mich.)
Sierra Dupre (Pittsburgh Riverhounds SC; Pittsburgh, Pa.)
Riley Kennedy (North Carolina Courage; Holly Springs, N.C.)
Jaiden Rodriguez (San Diego Surf SC; San Diego, Calif.)
Chloe Sadler (La Roca FC; Hyde Park, Utah)
Ashlyn Anderson (Indy Premier SC; Carmel, Ind.)
Micayla Johnson (Michigan Hawks; Troy, Mich.)
Ella Kral (Lamorinda SC; Berkeley, Calif.)
Paige Pasinski (SC del Sol; Phoenix, Ariz.)
Ava Stack (Concorde Fire; Atlanta, Ga.)