Under the Withdrawal AgreementWithdrawal Agreement The Withdrawal Agreement sets out the terms of the UK’s withdrawal from the EU and provides for a deal on citizens’ rights. It sets out a transition period which lasts until 31 December 2020. During this time you can continue to live, work and study in the EU broadly as you did before 31 January 2020. If you are resident in Austria at the end of the transition period, you will be covered by the Withdrawal Agreement, and your rights will be protected for as long as you remain resident in Austria. Any rights that are not covered by the Withdrawal Agreement will be the subject of future negotiations. https://www.gov.uk/government/publications/new-withdrawal-agreement-and-political-declaration , the EU’s social security coordination rules will continue to apply in full to individuals in full scope, including UK nationals living and/ or working in the EU and EU citizens living and/ or working in the UK by the end of December 2020, for as long as they remain in full scope.
Let us know if you found the content useful, even if the answer wasn't what you'd hoped for. That’s the only way we can improve.