If you have a Bluetooth compatible bulb, apparently there is a separate Hue app that can reset the bulb. Info about it here. If that works for you, you can then delete the device from ST using either the Advanced Web App or the community developed ST API Browser+.
I happen to have both, about 15 minutes ago I decided I’d drag my ladder in and reset it with the hue dimmer switch. PITA but worked well enough. I’m in the process of switching to Home Assistant. TY for the reply