I tried with a Likebook Mimas. While its browser is not entirely broken for "normal" navigation it is unable to render books from
https://galicia.ebiblio.es/opac/#indice, which are intended to be displayed online or available via ADE.
The same library provides an android application, based on webview, which is still unable to display most titles on the catalog. Specially if they're bloated with images or are just pdfs.
Pair that with page turn animations on e-ink: a big
nope for me. I'm fine reading the same books on my apple & huawei tablets.