When I bought my B2650HSD new in 2017 there were pretty much zero issues like you described, including getting both operating AND assembly manuals for all the attachments I purchased new at the same time and dealership: BH77, LA534, BB1560, B2782B, SSQA forks. The rest of my attachments have been acquired elsewhere since, used and new.
When delivered I went over all the bolt torque checks as well, none loose. Fluid levels, lubed zerks, tire pressures, etc etc.
Someone went over these machines before they delivered them to me, REALLY thoroughly.
The only issue I have had how tight it is to get the backhoe's right mounting pin to slide into place when attaching the backhoe. I've dealt with it by carrying a mallet for in-out assist, lightly grinding a slightly deeper bevel along the pin lead edge, and keeping the pins and raceways clean and lubricated. Now 4 years later it slides in just fine. It's a matter of not wanting to loosen all the BH subframe bolts and attempting a realignment myself, or sending the tractor 100km to the dealer for a fix.
I have no idea where exactly the machines were manufactured. Bought in Dec. 2017 in Manitoba, Canada.
It's been great.