It's because none of those companies is considered "Information Technology" according to the official GICS criteria [0] used to classify companies in the index. For instance, Meta and Google are in the "Communications Services" sector; Amazon is in "Consumer Discretionary." There are 69 total companies in the S&P 500 in the "Information Technology" GICS sector [1], and all are excluded from SPXT.
There are equal weight S&P ETFs, which avoid having a handful of stock dominating. However, they do have to do a lot more rebalancing to keep things in line.
