Most likely there is a grounding grid there is already which was done when pool was built. Most likely you would have to ground just the handrail.

If I'm not mistaken, all metal components (I think) within 5’ of the water’s edge of the pool including handrails, ladders, slides, etc the metal parts which embedded into concrete have to be bonded to that grid.

I'm not an electrician so don't hold me to it, I have a few friends who build pools they been talking about this stuff... Your best bet is to call a local licensed electrician and ask, they up with the requirements they will know.

Article 680 in the National Electrical Code must be followed for swimming pools.

Bonding of anything metallic within 5' of the water is required.

Bonding is different than grounding.

I would suggest you contact an electrician who is versed in swimming pools and can perform a bond test on the pool. It's very important this is done.

Yes, the handrail must be bonded. Lights as well.

How about a composite (plastic) deck railing? That would be non-conductive and thus inherently safe.

Saftron is a manufacturer that offers polymer pool rails that do not require bonding provided you use their anchor socket set as well,

We installed a handrail many years ago for a hotel indoor pool.

Colors are now available.

I would still recommend a bond test on the remaining components of your pool.