We adopt our old AngularJS APP to use SPFX. Great problem is Office Fabric UI. This library is added to the page and I cannot change it.

We use Office 2.1 and other icons and in addition, we develop for on-prem version SP and cannot use CDN because our clients work without the Internet. I tried to use SPComponentLoader to load my version of Office Fabric

},
"dependencies": {
"@angular/router": "^9.1.9",
"@microsoft/sp-core-library": "~1.1.0",
"@microsoft/sp-loader": "^1.10.0",
"@microsoft/sp-lodash-subset": "~1.1.0",
"@microsoft/sp-webpart-base": "~1.1.0",
"@types/angular": "1.6.6",
"@types/jquery": "^1.10.31",
"@types/react": "^16.9.35",
"@types/react-dom": "^16.9.8",
"@types/webpack-env": ">=1.12.1 <1.14.0",
"tslint": "^6.1.2",
"typescript": "^2.4.2"
},
"devDependencies": {
"@microsoft/sp-build-web": "~1.1.0",
"@microsoft/sp-module-interfaces": "~1.1.0",
"@microsoft/sp-webpart-workbench": "~1.1.0",
"@types/chai": ">=3.4.34 <3.6.0",
"@types/mocha": ">=2.2.33 <2.6.0",
"gulp": "^3.9.1"
}
my package.json

How I can use my own version of Office Fabric? I don't see any settings for it