Caveat - current 787 driver, not 747.
If the FDs or AP are on then the autothrust engages in THR mode for 2000 fpm. Pushing a TOGA switch with FDs off will bring them back temporarily, so yes, you'll get your 2000 fpm thrust target.
Last edited by Fursty Ferret; 1st May 2021 at 11:44.