After marriage, are a woman’s actions a man’s responsibility? Say she doesn’t do hijab and her husband tries to convince her however she still does not. Will her husband be held accountable for what his wife does? ( be it not wearing hijab, not praying namaz, listening to music etc)

If her husband reminds her to fulfill religious obligations, he tries to find creative ways to convince her, and he makes it clear to her that he is not ok with her committing sins, then he has fulfilled his obligation even if she refuses to listen.