I live in an old building in Sweden and the sockets are unearthed. Two pronged EU type.

I want to plug in an extension lead (earthed) and to have 3-4 appliances running off the extension lead. The appliances would be 1) lamp, 2) phone charger 3) TV

Would this be ok/safe to use earthed extension lead and appliances through an unearthed socket? What are the risks? I don't want to frazzle the TV or myself!

Also in Sweden they sell earthed and unearthed extension leads, which would be most suitable in this instance?

Thanks very much for any help/answers!

EDIT:
Thanks very much for all useful and helpful answers! Much appreciated, really overwhelmed actually by the time taken to provide such comprehensive responses, testament to great community knowledge and helpfulness so thanks again. I will now only used double insulated devices in the unearthed socket and until I have an electrician swap it out to an earthed. Cheers!