Windows explorer allots 15 custom overlay icons (Windows reserves 4, so effectively only 11 overlay icons) - they are shared between multiple applications (Google drive, One drive, Tortoise SVN). If you have multiple applications installed - the first ones in list will display their icons, rest of applications won’t.
Problem is described deeper in: https://tortoisesvn.net/faq.html#ovlnotall.
Solutions:
Open registry editor in:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers
Rename or remove icons which are not important to you to start from ‘z_’ prefix (will be last in list, will not be used after that).
Windows restart might be needed, as just restart explorer does not work.