Can I pair multiple MFi hearing aids to iPhone 17?

I am not familiar with using two pairs of hearing aids, so this divergent thought might sound really dumb to you.

When you pair and connect a hearing device (one at a time) to your iPhone, you are making TWO logical connections.

One is to allow iPhone Audio, such as call Audio, to be sent directly to your Hearing Aids.

the Second is to allow your iPhone APP to CONTROL your Hearing Aids, such as change Volume levels or programs without having to push the buttons on the hearing device itself.

With or without those connections, Ambient/Environment sounds are still send to your ears.

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If you are changing to a different set of hearing aids to go to sleep, do you really need either of those connections? What if you just left the daytime hearing Aids connected to your iPhone all the time?

Many users (especially Apple Watch users) set an automatic 'Sleep' focus at bedtime, and it is very similar to 'Do Not Disturb' focus in that no messages or calls will generally be forwarded through.

Hi Spring-Star

welcome to this Apple (user-to-user) Community!

Re: "Can I pair more than one set of MFi hearing aids to my iPhone 17?"

Am no expert, yet you deserve some reply, and your request has no response as yet:

Seems the process you are using is the correct method ... as you say, only one set of hearing-devices can be in use at a time.

Wondering whether it may be possible to connect one pair of hearing-aids as an "accessory" to check whether they remain available for choosing.

See how to: Connect iPhone to Bluetooth accessories - Apple Support

and how to:

Play audio from your iPhone on a Bluetooth accessory - Apple Support

Else:

You may want to check with the experts on the Accessibility Support team:

See: How to contact Apple for help with accessibility features - Apple Support 

All the best :-)

Based on my husband's experience over the years, you can only set up one pair of hearing aids at a time. He was always instructed to uninstall one set before setting up the other. He always followed instructions from the heading aid company. I suggest you contact either the office who prescribed the hearing aids or Signa itself.

Good luck.