Blind signatures have various applications and as you may have already figured out, employing them in bitcoin is an application side issue and has nothing to do with full nodes and verifcation process.

For bitcoin ECDSA 256k1 encryption algorithm various blinding functions (f) has been proposed for instance: https://eprint.iacr.org/2018/660.pdf

I've no further information about the extents this technique is used in bitcoin ecosystem but the point is bitcoin nodes and their script processing engine are absolutely neutral in this regard and don't need to improve for supporting it.