My ear doctor suggested the myNoise app[0] for me, specifically the Neuromodulator and Brown noise sounds.

The Neuromodulator[1] is a random-ish noise field that ... confuses? the brain after a while and lets you forget the tinnitus - at lest temporarily. The noise isn't "real" it's the brain generating it due to faulty signals, so giving it a bunch of noise helps somehow.

Brown noise[2] was specifically suggested for older people as it has more stuff in the frequencies we still hear naturally :D

As a happy coincidence my partner AND dogs sleep better with the brown noise on, they all tend to wake up to the smallest of noises - this helps with it.

[0] https://mynoise.net

[1] https://mynoise.net/NoiseMachines/neuromodulationTonesGenera...

[2] https://mynoise.net/NoiseMachines/whiteNoiseGenerator.php