I have not worked out the answer to this fishing around ext…

I have not worked out the answer to this fishing around extensively of bsv applications for what seems an eternity, however this is the advised route. "
Canonical content: Publish your content once and compute its immutable hash (e.g., SHA-256) and/or record the on-chain txid that anchors it.
Editions: Mint N tokens. Each mint is a separate output with its own unique token/UTXO, but the metadata for each includes the same contentHash (and optionally the same contentUrl).
Optional numbering: Include editionNumber and editionTotal if you want 1/100, 2/100, etc. Or omit numbering for identical editions.
Is there a “mint X amount” field?
It depends on your minting tool. Some UIs have a quantity field (“editions” or “supply”) that repeats the mint for you. Others require you to loop/bulk-mint N times.
Either way, the result is the same: N distinct mints, each referencing the same contentHash.