`poly_utils.py` in https://github.com/ethereum/research/tree/master/mimc_stark is a fairly simple one-file general-purpose library for arithmetic over prime fields, including multi-point evaluation and Lagrange interpolation; secret sharing and erasure coding are quite easy to implement with these primitives.
I've seen SSS used in Ethereum smart-contracts before. Grid+ https://blog.gridplus.io/simple-security-with-shamir-secret-... and Blockstack: https://github.com/blockstack/secret-sharing and uPort: https://github.com/uport-project/sss-wasm come to mind.