Psychedelic sessions may help some older adults feel less anxious and mentally overactive, which can indirectly support sleep. Evidence specific to chronic insomnia in older adults is still limited, and results vary by person. I cannot verify that it will help in your case.
Age by itself is not an automatic barrier, but careful screening and professional guidance are important. Health conditions and medications should be reviewed first. Benzodiazepines like bromazepam can dampen psychedelic effects, so any change to medication needs to be discussed with your doctor. If pursued, a calm setting, modest dosing, and strong preparation and integration with a focus on relaxation and sleep routines are key.
For an anecdotal perspective from someone in her 70s who described relief from long-standing mental strain, you can read this personal account.
If you consider this route, start with a thorough intake and involve your healthcare provider. Pair it with consistent, gentle sleep practices to support any benefits. Wishing you clarity and good rest.