Biden won it pretty solidly 63.9 Biden, 34.8 Trump. Even when Bush was GOP leader, pretty sure both Kerry and Gore won Houston proper although bombed badly in suburbs thus why Bush won Harris County. Nonetheless, Bush did get in 40s so did fairly well for a city that size.
Houston proper swung to Trump though compared to 2016, I just don't know how much.
If you take Montgomery County, TX, then it would swing to Biden.
I can tell you it wasn’t much cause Trump wasn’t popular in Houston and the main cities of Fort Bend County.