It's suburban. There were eight Republicans splitting the vote vs. only six Democrats among the top 14 contenders. It was only +3 for Trump last go-around.
Texas' Sixth District is one of the areas in which recent voting patterns and demographic changes have excited the Democratic Party about the Lone Star state. After years of being a virtual lock for the GOP, the district went from being won by John McCain in the 2008 presidential election by 15 points to going for Trump in 2020 by just a three-point margin.
Oops.
Furthermore, a "never-Trumper" and frequent guest on MSNBC and CNN in the runup to the election, came in tenth.
It did help that one of the Republican candidates was the wife of the previous officeholder who had passed away (hence the vacancy). However, it's not as if she ran away with it, and in fact ran neck and neck for first. Further, of all the candidates, the GOP captured over 60% of the vote.
Each election has its own unique dynamics, of course, and not too much should be made of any single one (although we'd certainly be hearing endless talk of a "blue wave" had things gone differently).
That said, maybe, just maybe, Democrats should reconsider the popularity of policies like open borders, multi-trillion-dollar spending bills, puberty blockers for preteens and a socialist green utopia in red states they are seeking to turn blue.