Comment # 9 on bug 1192569 from Robert Munteanu

Yes, it works on 5.14.11 but not on 5.14.14. Here is some debug output

For 5.14.14
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+ uname -r
5.14.14-1-default
+ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ scanimage -L

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
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For 5.14.11
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+ uname -r
5.14.11-2-default
+ lsusb
Bus 002 Device 002: ID 04f9:0469 Brother Industries, Ltd DS-740D
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 06cb:009a Synaptics, Inc. Metallica MIS Touch
Fingerprint Reader
Bus 001 Device 004: ID 04f2:b614 Chicony Electronics Co., Ltd Integrated Camera
Bus 001 Device 007: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 Gigabit
Ethernet Adapter
Bus 001 Device 010: ID 04d9:a09f Holtek Semiconductor, Inc. E-Signal LUOM G10
Mechanical Gaming Mouse
Bus 001 Device 014: ID 04d9:0356 Holtek Semiconductor, Inc. Ducky Keyboard
Bus 001 Device 012: ID 0489:c001 Foxconn / Hon Hai Nokia 7 plus
Bus 001 Device 008: ID 19f7:0015 RODE Microphones R���DE NT-USB Mini
Bus 001 Device 005: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 001 Device 003: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 001 Device 002: ID 1050:0407 Yubico.com Yubikey 4/5 OTP+U2F+CCID
Bus 001 Device 013: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560 Jefferson Peak
(JfP)
Bus 001 Device 011: ID 04f2:b615 Chicony Electronics Co., Ltd Integrated IR
Camera
Bus 001 Device 009: ID 056a:5191 Wacom Co., Ltd Pen and multitouch sensor
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ scanimage -L
device `brother5:bus2;dev6' is a Brother DS-740D USB scanner
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And thanks for the -devel hint, I'll use that next time.