I had bookmarked more different polls, but I lost all after I renewed my PC :/ You can look into it and find more.

The views and opinions of South-Eastern regions residents of Ukraine: April 2014 https://kiis.com.ua/?lang=eng&cat=reports&id=302&page=1&y=2014&m=4

The vast majority regions that Russia currently occupied/demanding were overwhelmingly pro-Ukrainian (opposing to Russian aggression) before the invasion. Or are you referring the annexation referendum or some vote results made under occupation by foreign military force? If you brutally invade a neighboring country and force its people to make an annexation referendum at gunpoint, surely the result will favor you, and you can invade other countries wherever you want like that.