I think the IRS technology for controlling the the wireless transmission parameters will undergo tremendous research to apply them in the the 6G mobile communication networks.
I think I wrote about this before for answering one your questions on this topic.
To be aware of the challenges and difficulties with the introduction of such devices please follow the paper in the link: https://hal.archives-ouvertes.fr/hal-03020450/document
2- Intelligent Reflective Surfaces for Wireless Networks: An Overview of Applications, Approached Issues, and Open Problemshttps://www.mdpi.com/2079-9292/10/19/2345
3- When Full-Duplex Transmission Meets Intelligent Reflecting Surface: Opportunities and Challenges
Preprint When Full-Duplex Transmission Meets Intelligent Reflecting S...
4- Full-Duplex Enabled Intelligent Reflecting Surface Systems: Opportunities and Challenges