It’s extremely easy to pad a week with meetings, “I’m checking/organizing my email”, “I need to double check code from last week”, etc… if you wanted to burn time.
Sure the remote worker has the opportunity to go hiking, but the business impact is the same. Except at least the hiking wastes less time from others.
The real issue is that with the big RTO push to save cities, who can't be saved BTW, avoided baking a WFH culture where people take WFH seriously providing an office room per worker at home, with all things needed there, instead of working with craptops anywhere. It's not different from people who take a photo of an email and send it via WA because they do still not having a clue about CC/BCC.
The most productive teams I worked with (only one exception) were mostly remote.
And yes, I also worked with remote teams that were slacking off.
What predicates performance in my experience is not if people are remote or not. It is the quality of the people hired and low churn.
Your problems might be a little bit more deeply rooted, WFH abuse sounds like a symptom and not a cause.