Kadyrov said that in his personal opinion, "more drastic measures should be taken, right up to the declaration of martial law at the border areas and the use of low-yield nuclear weapons."
The experimental pilot plan to implement Islamic financial practices in the country's Muslim-majority regions will, if approved, begin in February 2023.
Chechen leader Kadyrov urged the many regions in Russia to encourage self-mobilization, saying that each region should be able to gather at least 1,000 volunteers to help with Russia's war in Ukraine
The longtime ruler has been accused by advocacy groups of overseeing and turning a blind eye to abductions, torture and killings as well as suppressing political opposition.
Valid D., whose full name is withheld from publication under German privacy law, denies the prosecutors' allegations.
Ukrainian President Volodymyr Zelensky and US President Joe Biden discussed additional defensive and financial aid for Kyiv as well as sanctions and alleged Russian war crimes.
"There will be an offensive ... not only on Mariupol, but also on other places, cities and villages," Kadyrov said in a video posted on his Telegram channel.
Ukraine's intelligence service claimed that 100 Chechen criminals with serious convictions will be recruited to fight in Ukraine, as will be Russian reservists.
Kyiv claimed it received intelligence from FSB agents who "have no desire to take part in this bloody war."
Chechen general Magomed Tushayev was killed on Saturday, and was responsible for for torturing and murdering LGBTQ+ individuals.