Is it normal to lose all glutes?

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I'm 3 months post-op, lengthened 4.4 cm with Betzbone nails so far, and had a soft ITB release. I've lost almost all my glutes, and to me, it doesn't feel like typical muscle atrophy due to inactivity. It seems like I can't activate the muscles anymore, as if it's a loose rope, and it's impossible to train those muscles.

Is this normal? If yes, then why? What is the mechanism behind it? If it's not normal, could it be the ITB release? Does anybody know how to address it, and will it return to normal after some time?

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Did you get an ITB release? I've been trying to train the glutes isolated, but it's almost impossible. There's just not the needed pre-tension to achieve a noticeable training effect.