Is there a boss mode for REVVL 4+ alarms so they work with Smart Nofitications and Battery Minder?

I have a REVVL 4+ which is model 5062W running Android 10 (Version 2A91, build QKQ1.200326.002) and I can’t get alarms to go off in Alarmy.  This is a great app for making sure I notice it up to now (on LG V40 for example,) but despite deactivating smart notifications and battery ‘saver’ alarms set more than 4 minutes ahead never go off!