You mentioned two issues:
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Show as localhost. Pls refer to GL-MV1000 with AdGuard all clients show as localhost
There are also other posts talking about this. -
Does not block Ad on some of your wifi devices. Two possible reasons: (1) Your device has encrypted DNS settings and the router/adguard home cannot do anything; (2) Adguard Home does not block all Ads and maybe it is just normal.