Support to add the DSCP value to the existing random-detect policy.
As per the Linux docs, it could be possible with Generic Random Early detection(GRED) with several internal queues, whereby the internal queue is chosen based on the Diffserv tcindex field . More than this no information found.
https://tldp.org/HOWTO/Adv-Routing-HOWTO/lartc.adv-qdisc.gred.html

Need similar implementation like Cisco's Distributed Weighted RED
https://www.cisco.com/c/en/us/td/docs/ios/qos/configuration/guide/12_2sr/qos_12_2sr_book/config_wred.html