Here in Aus, because we are entering the summer months, it has been decided to initially limit it to people who have not got the 4th booster yet. While not decided yet, it is thought that everyone will get it about March/April next year when we are due for our flu shot. The combined Covid/Flu vaccine may be available then.
For the full picture of what is happening in Australia:
https://www.health.gov.au/health-alerts/covid-19/case-numbers-and-statistics
Interestingly, Australia's seven-day average death rate is now just four and declining. Combine this with the fact that only 4% of those that die have had the 4th dose, and it is easily seen that your risk of death, while now low, is very low if you have had the 4th dose. Again - please, please get the 4th dose. As only 30% of people in Aus (about 40% of those eligible ie over 30) have had the 4th dose, the protection would be about 86% less likely to die. Remember, this is Australia - I have read in other countries, it can be a bit different - eg in Isreal, it is 78%. I believe everyone should get the fourth dose, just a personal opinion. The consensus in Aus is if you are under 30, your chance of dying is very small anyway. I believe it has been established, at least on the Gold Coast near where I live, that 90% of people with Covid do not even know it and carry on with life as usual. Anything we can do to reduce the length of time you are infectious will help. It is not just the death rate that is a concern - so is long Covid.
Thanks
Bill