PhD advisor does not correct my writing: how can I get feedback?
Communicate more directly with your advisor about your expectations: state that you are concerned about your writing and would prefer more feedback on it, and be specific. Are you concerned about organization? Word choice? Grammar?
If your advisor isn't a native English speaker, they may not be the best person to give you feedback on some of these; they may themselves make mistakes in grammar and word choice even with more experience writing papers. In that case, you can ask them for advice on who else in your circle might help.
At my own institution, there is also a writing center that caters to undergraduate and graduate students alike; they won't copy edit your work for you, but they'll help you work on proofreading and editing skills. Your institution might have something similar.
Beware also of the impostor syndrome: you might be overcritical of your own work, so don't be too skeptical if you get feedback that your writing is actually good. That said, everyone can improve their writing at every stage of their career, so don't skip opportunities to read about writing and find stories about how others have become better writers or discovered bad tendencies and worked to correct them.