how to align foots of the animated character on ground in sequencer ?

There are lots of stuff to align foots on ground for player; like below:
[1]: Advanced IK Foot System in Blueprints - UE Marketplace
[2]: +https://www.unrealengine.com/marketplace/en-US/slug/advanced-ik-foot-system

but how can I align characer foots while animating in sequancer.
for example ;
the character’s walk animation is looping. but the ground is slope. when ground is starting to slope ,the character’s foot starting to react ground slope.
i guess we have to use physics in sequancer but how to set the configuration.

thank you in advance;