keepUserData example

    public static function getSubscribedEvents(): array
    {
        return [
            AppDeletedEvent::class => 'onAppDeleted',
        ];
    }

    public function onAppDeleted(AppDeletedEvent $event): void
    {
        if ($event->keepUserData()) {
            return;
        }

        $app = $this->appRepository->search(new Criteria([$event->getAppId()]), $event->getContext())->first();

        if ($app === null) {
            return;
        }

        $this->themeLifecycleService->removeTheme($app->getName(), $event->getContext());
    }
}

$config = $this->storefrontPluginRegistry->getConfigurations()->getByTechnicalName($pluginName);

        if (!$config) {
            return;
        }

        $this->themeLifecycleHandler->handleThemeUninstall($config, $event->getContext()->getContext());
    }

    public function pluginPostUninstall(PluginPostUninstallEvent $event): void
    {
        if ($event->getContext()->keepUserData()) {
            return;
        }

        $this->themeLifecycleService->removeTheme($event->getPlugin()->getName(), $event->getContext()->getContext());
    }

    /** * @throws ThemeCompileException * @throws InvalidThemeBundleException */
    private function createConfigFromClassName(string $pluginPath, string $className): StorefrontPluginConfiguration
    {

        $uninstallContext->setAutoMigrate(false);

        $this->eventDispatcher->dispatch(new PluginPreUninstallEvent($plugin, $uninstallContext));

        if (!$shopwareContext->hasState(self::STATE_SKIP_ASSET_BUILDING)) {
            $this->assetInstaller->removeAssetsOfBundle($pluginBaseClassString);
        }

        $pluginBaseClass->uninstall($uninstallContext);

        if (!$uninstallContext->keepUserData()) {
            $pluginBaseClass->removeMigrations();
            $this->systemConfigService->deletePluginConfiguration($pluginBaseClass);
        }

        $pluginId = $plugin->getId();
        $this->updatePluginData(
            [
                'id' => $pluginId,
                'active' => false,
                'installedAt' => null,
            ],