I can't speak to all women but from my experience what has made me feel valued and actually like my work environment is:
(1) Having a team that works together, having a culture of competition amongst team members feels counter intuitive. Having team members that you can lean on and lead is pivotal to personal growth and super helpful if your team lead is 'too busy'.
(2) Be or have a team lead who is patient and willing to mentor and answer questions. The team lead should be the person setting the tone for the dynamics of the team. When they seemed annoyed every time anyone asks them a question, has a harsh tone with every code review comment, basically seems like they don't have time for a core part of their role as a team lead it leaves those reporting under them feeling less enthused to want to work with them.
(3) Listen. No really, stop talking and just listen. If someone reaches out for help, let them explain the problem before you speak over them (it saves time backpedaling your assumptions on the issue). This goes across the board, other women can totally be offenders too. Check yourself, and let others speak.
(4) Growth opportunities. This is universal as well, not gender specific but I've seen this happen way too often with women. Companies will hire out rather than promote within. It's easy to obfuscate the decision to a 'company decision' but really it's individuals, individuals that we interact with daily that don't believe we can do the job.
(5) Inclusivity. Others have mentioned this one and it's definitely something that I've struggled with in the past. Sometimes it's easy to just keep to yourself if you're one of the only or the few in a group it's easy to feel like you don't belong. I tend to push myself out there even though I'm very introverted. Others might not, so it's important to meet people where they are and reach out or try to plan events with everyone in mind. While some people may love drinking, others might not, so instead of a bar maybe do an activity where everyone can participate but you can byob or there's a so it's a happy balance.
There's probably more but these are the top items I can think of at the moment. Would love to see other ladies' perspective!