Since Neovim 0.10, `:tab term` now opens the terminal window in a new tab. And you could use the exact same command in Vim since they introduced their own term

Since Neovim 0.10, `:tab term` now opens the terminal window in a new tab. And you could use the exact same command in Vim since they introduced their own terminal emulation feature in Vim 8.0.0693.