This also means, you can use any LPA implementation to manage and install profiles on your own!
Some examples:
https://github.com/Truphone/LPAdesktop Needs a smart card reader and a pc to work
https://github.com/estkme-group/lpac Could either use a smart card reader or an actual modem with AT-support
https://gitea.angry.im/PeterCxy/OpenEUICC Needs a root on Android
Furthermore, I believe you could manage it via Windows settings if your window laptop has a WWAN card.