I would like for Geyser support to be added to Polymer, so that registered textured and animated or modelled blocks and their associated models etc can be loaded using the official Bedrock Edition way of doing things if the client is on Bedrock.
https://wiki.geysermc.org/geyser/custom-blocks/

Immediately, resource pack generation would be the hardest/most time-consuming thing to implement here. Polymer has basically everything needed already bar the ability to send a bedrock resource pack to bedrock clients.

If this is already in the works or has been implemented as a plugin/addon by someone else please let me know!

Thank you, that project looks pretty interesting!

While not ideal, there is a https://github.com/sylvxa/bedframe which can try handing some model / resource pack related stuff.