I think in reality it's common that there is not one design that would work well for all people with disabilities. Making hygiene more accessible therefore requires us to work through community leaders and Disabled Persons Organisations to identify people with disabilities and work with them to design facilities that suit their needs.
Some resources that could be useful are the new compendium of handwashing facilities2 (developed during the pandemic). This covers information on the accessibility of some designs. In the past, I have found the inclusion audit tool developed by WEDC7 very useful. It's designed for water and sanitation but can easily be adapted for hygiene. There are also some tips in this Hygiene Hub learning brief3 about inclusive programming.
It would be great to hear the experiences of others too.