Black Bamboo

A few years ago I spent a goodly chunk of the garden budget on a black bamboo.  It took a couple of years to establish, but last year sent up huge stems. It looked really great.
But this year it has decided to set seed, has sent up no new shoots and the leaves are dropping.  So I guess it's dying!  Last year was a gregarious flowering & dying year for it world wide, but i haven't come across any cases in 2023 yet.
The challenge will be trying to collect and germinate the seed - anybody have any experience or advice?!