This one?
Around this time last year, Tuya changed their firmware in a way that made it impossible to flash devices over WiFi using Tuya-convert. You can theoretically still put Tasmota on them with a physical connection, but that’s tricky to do (particularly if you don’t have much experience with electronics).
Unless you want the challenge of opening up the BN-LINK (with no guarantees that it will work), I would just get the Kasa KP115. Saving $16.50/plug isn’t worth the hassle unless you absolutely need specific Tasmota features that Kasa doesn’t offer.
Note that the KP115 requires you to either upgrade to the OH3.1 Milestone or manually install the 3.1 binding (see discussion).