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.
[0] https://www.proshares.com/our-etfs/strategic/spxt (S&P minus tech stocks)
[1] https://www.defianceetfs.com/xmag/ (S&P minus "Magnificent 7")