If it's really a non-custodial wallet, then there's a way to recover the funds,
Again, does your Abra's BTC address starts with '3'?

To confirm the info from DdmrDdmr's reddit link, ask them (Abra's Customer Support) these:

• The derivation path for your Bitcoin SV [BSV] account.
• If the 13-word seed is BIP39.

Just do not share the seed here, those info are enough to be able to recover your Bitcoins.