Stay in the UK if you still have a job and haven't resigned. Use this coming year to upskill, learn a few new topics, learn about IB, do something new that adds to your CV etc. There are just 8 weeks left before most teachers should be leaving for induction. Documents aren't being verified. There is confusion and silence about work visas, or any visa. Ditto for flights, medical insurance, and more. If you arrive at any new school, you would need to be super flexible in what subject you teach and allow the owner and Government to order you to do anything, as there will be teachers who decided not to go, possible extensions of the school day and holidays to enable social distancing and to plug gaps in education. You need to be prepared for changes to your "contract" which might leave you getting a big cut in salary, or working for a deferred salary, as is happening in Kuwait this Summer and other ME countries. You might have to put up with widespread racism whipped up by Governments towards foreigners, like in China. If you have a UK job, then keep it. Go abroad next year.