About 8 weeks back... US HUD released updated CHAS data based on 2016-2020 ACS 5-year surveys. This is your best bet for obtaining socioec data of households by "percent of AMI" level -- and also comparable housing stock by "percent of AMI" level. www.huduser.gov/.../cp.html
If you wanted something different? more bespoke than the HUD CHAS tables... certainly you could build your own tabulations with PUMS (or IPUMS) -- but you then lose the tract-level detail, and have to work with more highly-summarized geographies (PUMAs, groups of counties, whole states).
good luck.