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Maybe not on all, but you can set depth, time, and NDL alerts on the Peregrines.I do not believe so. You can back into the depth alarm by setting a ppO2 alarm but I do not believe these are prioritized features on the Shearwater computers.
I'm not seeing a way to do this on my partner's Teric, though it's not on the latest firmware version.
My Perdix AI, and the Perdix 2 have this feature—I have mine set at 30 m / 60 min alerts.
You should contact Shearwater support and let them know you'd like that feature, it might make its way into a future firmware version.