There are a lot of indications that the Russians are preparing for a major offensive against Ukraine. From Simplicius The Thinker at simplicius76.substack.com:
Calm before the storm.
“Strictly speaking, we haven’t started anything yet.” ~Vladimir Putin, July 2022

Since we’re getting so close to approaching the nail-biting period of February 21 – 24 that so many are anticipating, I figured it’ll be good to compile all the recent, top developments regarding the potential for a new ‘major’ Russian offensive. Some of them have already been mentioned in a previous update, but we’ll cite them again to centralize all relevant materials.
1. First, there are two reputable channels which are now confirming major actions are coming within a week. Romanov Lite, who many of you know, is a Crimean based commentator who also works with some Russian/Donbass units, helping supply them and is often seen on the lines with them, often has insider info as he speaks directly to the troops. He posted this message that it is soon GO TIME:

Note, the specific confirmation of something we predicted here in one of the recent reports, which is that the offensive is likely to kick off, not all at once but in several stages in order to maximize confusion, allow a little lead time for AFU to frantically send reserves to one direction to caulk the flow, only for a completely different direction to massively kick off into un-reinforced territory.