Can be used, but does not support fast charge.
Oneplus 9r does not support Huawei's fast charge, because this model of OnePlus does not support Huawei's fast charge agreement, so it can not use Huawei's fast charge, which is normal, the fast charge agreement of various brands can not be universal, OnePlus can only support his own fast charge agreement, so he can not use Huawei's fast charge agreement.
It can be charged, the power is about 10W, and it can not be charged by Huawei fast, because the charging agreement of OnePlus mobile phone and Huawei mobile phone is not compatible.