Reflenvestigations of Security Threats and Solutions for 5G and next Generation IoT Systems

I NEED THE WRITER TO ADD QUESTIONS TO MY RESEARCH PROPOSAL, up to 3 questions that are critical to address in my work. because my context of work seems broad, I want the writer to make it more specific. I want to talk about the 5G/6G in critical infrastructure such as smart grid or industrial control system.
for example
https://link.springer.com/article/10.1007/s11277-019-06274-5
http://www-file.huawei.com/-/media/CORPORATE/PDF/News/5g-network-slicing-enabling-the-smart-grid.pdf
https://arxiv.org/pdf/1909.08096.pdf
https://www.ericsson.com/en/security/a-guide-to-5g-network-security
http://www.5gensure.eu/sites/default/files/Deliverables/5G-ENSURE_D4.1-5G_Security_testbed_architecture_v1.0.pdf
http://epubs.surrey.ac.uk/852820/1/Machine%20Learning%20for%205G.pdf
https://www.5gamericas.org/wp-content/uploads/2019/08/5G-Security-White-Paper-07-26-19-FINAL.pdf
https://5g-ppp.eu/wp-content/uploads/2014/02/5G-PPP_White-Paper_Phase-1-Security-Landscape_June-2017.pdf

5G security and privacy for smart cities

https://securingsmartcities.org/wp-content/uploads/2019/11/SSC5G.pdf
https://www.paloaltonetworks.com/cyberpedia/smart-cities-in-the-age-of-5g-and-iot
https://ieeexplore.ieee.org/document/7961587
https://ieeexplore.ieee.org/document/8975875
https://ieeexplore.ieee.org/document/8737800
https://ieeexplore.ieee.org/document/8938064
https://ieeexplore.ieee.org/document/8480296
https://ieeexplore.ieee.org/document/7986273
https://ieeexplore.ieee.org/document/8247106