I think it's legit?
https://duckduckgo.com/?t=ffcm&q=The+Milo+Fund+LLC
There are some articles mentioning the LLC raising money for Kyle and having been set up by Wendy but it also brings up LLC at 4850 East Creek Ridge Trail, Reno, NV 89519.
A search for that address, https://duckduckgo.com/?q=4850+East+Creek+Ridge+Trail%2C+Reno%2C+NV+89519.&t=ffcm&atb=v1-1&ia=maps" brings up. https://voterrecords.com/voter/73925980/madison-latham-kapitz?__cf_chl_captcha_tk__=pmd_8na_2cENSWM.DVZGRU0Rnyj4kSrhIhfiAT1NwhwZT58-1635431368-0-gqNtZGzNAxCjcnBszQhR
Madison Latham-Kapitz (age 26) is listed at 4840 E Creek Ridge Trl Reno, Nv 89519 and is affiliated with the Democratic Party. Madison is registered to vote in Washoe County, Nevada.
Here's the house at that address; https://www.zillow.com/homedetails/4850-E-Creek-Ridge-Trl-Reno-NV-89519/7336591_zpid/
So the question is, why did Wendy of Wisconsin start an LLC in Nevada with the business address being a 26 year old democrat voter? An LLC is easy to start anywhere though I do know there are certain protections from using NV. Articles about the LLC all have tweets from a dedicated MILO LLC twitter account. I'd prefer to see something on Wendy Rittenhouse's twitter if she has one or a video of her saying she set it up or something. This is all just a bunch of stuff on the web so there's no way to tell what's legit, including what I found.
https://news.yahoo.com/rittenhouse-legal-team-says-nearly-002500525.html
The twitter account; https://twitter.com/freekyleusa/
The type of things being posted by that twitter account would not be tolerated by the judge if the LLC was indeed started by Kyle's mom imho.