U should be recieving an invite soon if u have applied in Apr2022.. as already mar 2022 applicants have recieved invites for test. So next 15 days u should most probably get it too.. now depending on ur council u may or maynot get the ceremony done before mar 2023. U have 1 year after approval to attend the ceremony. Or else ur approval gets cancelled..
If u r in council with longer wait times for ceremony u can move to another council. Get ceremony done..apply priority passport n all set to leave before March..good luck.. u r almost there.. would definitely suggest to complete the procedure n leave.