Android Instant Apps documentation states in the restricted features section that it can not:
Run unverified software, run ar
This statement:
Prepare your app > Restricted features
Run unverified software, run arbitrary native code, or load code dynamically other than the code provided by the Instant Apps runtime.
Refers to APKs, libraries, or code that is sideloaded, not packaged within the original apk.
unverified software
arbitrary native code
load code dynamically