WWE recently filed trademark requests for the term "In-Dex" on April 24, 2021 with The United States Patent and Trademark Office. Below is the description of their listing:

International Class 041: Entertainment services; namely, wrestling exhibitions and performances by a professional wrestler and entertainer rendered live and through broadcast media including television and radio, and via the internet or commercial online service; providing wrestling news and information via a global computer network; providing information in the fields of sports and entertainment via an online community portal; providing a website in the field of sports entertainment information; fan club services, namely, organizing sporting events in the field of wrestling for wrestling fan club members; organizing social entertainment events for entertainment purposes for wrestling fan club members; providing online newsletters in the fields of sports entertainment; online journals, namely blogs, in the field of sports entertainment.

International Class 025: Clothing, namely, tops, shirts, jackets, sweatshirts, hoodies; outerwear, namely, coats; bottoms, pants, shorts, underwear, dresses, pajamas, lingerie, clothing ties, scarves, gloves, swimwear; Halloween and masquerade costumes; footwear, namely, shoes, sneakers, slippers, flip flops, boots; headwear, namely, hats, caps; wrist bands as clothing; bandanas

Based on watching NXT TV, this term is for the ongoing storyline involving Indi Hartwell and Dexter Lumis. WWE started using the term this past week.

Lumis has been feuding with The Way (Johnny Gargano, Candice LeRae, Austin Theory, and Heartwell) for the past few months. Lumis has challenged Gargano for the North American Title, kidnapped Theory, and is now apparently in a romantic relationship with Heartwell.