have you tried Stencil JS

[unborn raft]

no, we are using google Lit, but it doesn't matter. Because they just define new tags but Angular doesn't knows these tags.

[dreamy epoch]

yes coz Google Lit compile to js. To use JS based components you need to tell Angular with CUSTOM SCHEMA tag

afaik

but for Stencil JS the compile it to TS components which Angular can understand