So, what do we know about Parker? You are right that it's her second unofficial visit to Texas; first was for a home game in early December (although she surprisingly didn't post anything about it on her social media that I recall).
Based on her Instagram, she had visited LSU in September, and Baylor in October. No other posts about visits until this post about her visit to Texas (for an actual game).
From a little digging, Parker's Twitter account shows that in 2021 she visited, OU, OSU, Baylor and Eastern Michigan. In 2022/23 she made a second visit to Baylor and stopped by LSU and Texas (twice). She holds offers from Baylor, OU, OSU, Ohio State, Oregon, USC, UCLA Eastern Michigan, Miami, Kentucky, A&M, and others. She retweeted two Tweets of Bella Fontleroy (Baylor) being named Big 12 Freshman of the Week (twice). (Although I'm not 100% certain, she and Bella may have a connection from playing on the same AIA basketball team.)
Although Parker is is a great offensive player, it is her defensive skills and mindset that are a great fit for Vic's style of play. Several of Parker's HUDL highlight videos have the following names which emphasize her defensive play, "5 fast break points against Putnam City", "6 steals vs Del City", "3 fast breaks against Ponca City", etc..
Here are a couple of snippets from an article from the Ohio Basketball Live blog.
Standing at 6’1, she is a great height for a dominate lead guard at the high school level and beyond. She plays the game with tremendous poise and does not get rattled when she has the ball in her hand. Parker has an elite level understanding of the game and can play multiple positions on the floor. Scoring may not be her first instinct, but she can pile up points in a hurry once she gets rolling. She has great vision and puts her teammates in position to score when she delivers passes. She is physically gifted and does not mind taking on contact at the rim. Parker is a great finisher once she gets to the paint and can put the ball in the hoop with either hand.
Defensively she can guard any position on the floor if her teams need her to. She gets a lot of her transition highlights from being able to read passing lanes and get steals that lead to fast break points. She uses her body well to box out and frequently finds herself in situations where she is the leading rebounder on her squad.
Greg Riddle at the Dallas Morning News wrote an article on South Grand Prairie at the start of basketball season. This is how the SGP coach describes Parker.
SGP has added five-star guard Taliyah Parker, a transfer from Putnam City West in Oklahoma. The 6-1 Parker is ranked as the sixth-best junior in the nation by ESPN’s HoopGurlz.
“It’s huge. She is going to help us a bunch,” South Grand Prairie coach Brion Raven said. “She is super athletic, she is very unselfish with the ball. She is a phenomenal passer. She has probably always had a tag as a scorer, but she can facilitate and distribute the ball. She is a great team player. And defensively, she is off the charts. She can guard 94 by 50. She is the real deal.”
Here are a couple of highlight videos that show why so many schools are competing for Parker's committment. (Adhel Tac is also shown in the videos. Tac is #15)