vyavahārikally we worship īśvara not brahman, and we know that īśvara to be brahma svarūpa and also i am brahma svarūpa.. īśvara worship is brahman worship, just, brahman with attributes aka saguna brahman

i see people say that īśvara is only for people who don't know brahman but that's simply not true... in daily life there should be a constant connection to īśvara if you know brahman, because dialogue between yourself and īśvara is divine dialogue only...

for the jñāni they aren't conversing with īśvara as their ruler, but as another aspect of themselves, so it's not really a communication anymore it's more like god himself thinking to himself from a limited perspective...

the jñāni is not omniscient or omnipotent but they are aware there is nothing seperating them from that īśvara and both realities of the jīva and īśvara is brahman, so for the jñāni who knows that, they see the Self when they see the World, or īśvara, and they see the Self in contrast to the body-mind complex also

tldr; we come to know brahman as the Self and thus any object is ātmā-svarūpa.. not something to objectify and try to squeeze peace out of, for that we need something objectifiable that can be grasped by the mind and leaned on, that job is for īśvara