Admin home page as "Recent Activity" block in lower right that is a list of the most recent logs. You could always write an addon that would get just the failed login entiries. But suggest you work with something like the advanced log search for:
Period = this week
Type = users
Action = Failed logins
Which would come out something like the following.
https://your_host.com/your_admin_url.php?object=&is_search=Y&period=W&time_from=08%2F24%2F2020&time_to=08%2F24%2F2020&q_user=&q_type=users&q_action=failed_login&hint_new_view=Name&dispatch%5Blogs.manage%5D=Search
You can get rid of the time period and probaby add an '&items_per_page=10' to just get the most recent 10 entries of that type.
All UNTESTED
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