RWY25R at HKG, base leg at 8,000ft with speed control 180kts, requiring F2.
The usual is a corner cut direct to the LOC, which puts you above the GS. Maybe with a tailwind too.
At 8,000ft your ideal distance to touchdown is 24 miles, maybe you’re at 22 now and descending to intercept the GS.
You can take the gear and be back on GS almost instantly - then drag it in for the next 20 miles. Or, you can take half speed brake and drift down onto the GS at 180kts, then stow them when sorted out.
The FCOM comment is not a prohibition and it’s a better solution for pax comfort, noise, and fuel.