AFAIK, unfortunately, there is no easy solution in Windows to install your own block explorer.
But if you want to minimize third-party services/site usage, a few suggestions for you are to:
1. Use your RPI 400, to install one-click Bitcoin apps solutions like the above suggested.
Some cons are:
- You have to use another device for your air-gapped wallet.
- You have to redownload the bitcoin blockchain, unless you want to do some hassle to migrate your bitcoin data on Windows 10.
2. Follow this guide:
Bitcoin + Electrum server + Block explorer under Windows (with WSL and Debian) to install your own personal electrum server and block explorer.
The easiest solution without too much hassle is the first option. But if you have limited devices, you might want to go with the second option.