Adding to your comment, in the Munich Security Conference on 2022-02-19, Zelenskyy said:
“Ukraine will have every right to believe that the Budapest Memorandum is not working and all the package decisions of 1994 are in doubt.”
https://www.youtube.com/watch?v=EFV5nw1UUNY&t=900s
That “Budapest Memorandum” is this one:
“Until Ukraine gave up its nuclear weapons, it had the world's third-largest nuclear weapons stockpile, of which Ukraine had physical but no operational control. Russia controlled the codes needed to operate the nuclear weapons through electronic Permissive Action Links and the Russian command and control system, although this could not be sufficient guarantee against Ukrainian access. Formally, these weapons were controlled by the Commonwealth of Independent States.”
“Ukrainian President Volodymyr Zelenskyy has publicly commented on the Budapest Memorandum by arguing that it provides no true guarantee of safety due to Russia's coercive power. On 19 February 2022, Zelenskyy made a speech at the Munich Security Conference in which he said «Since 2014, Ukraine has tried three times to convene consultations with the guarantor states of the Budapest Memorandum. Three times without success. Today Ukraine will do it for the fourth time. ... If they do not happen again or their results do not guarantee security for our country, Ukraine will have every right to believe that the Budapest Memorandum is not working and all the package decisions of 1994 are in doubt.» Putin used Zelenskyy's comments as part of his claims that Ukraine could develop nuclear weapons. Critics have disputed Putin's claims. This treaty has since been violated by Russia at the outbreak of the 2022 Russian invasion of Ukraine.”
https://en.wikipedia.org/wiki/Budapest_Memorandum_on_Securit...
This might be what some interpret as Ukraine seeking to acquire nuclear weapons in the near future.