I apologise for answering the opposite. But I think it's worth pointing out that one of the options is to not use the SPI flash ROM. In four years and three PBPs, I have not used it. What I use these days is U-Boot 2021-07 on the eMMC.
https://www.youtube.com/shorts/jVab9bcjM_I
https://www.youtube.com/shorts/jVab9bcjM_I