That’s a traditional IRA, not Roth.
Traditional 401k balances transfer to traditional IRAs, and Roth 401k balances transfer to Roth IRAs.
Right but once your traditional IRA is fully rolled over to a 401k, you can take full advantage of backdoor Roth IRA contributions regardless of income.
Traditional 401k balances transfer to traditional IRAs, and Roth 401k balances transfer to Roth IRAs.