What type of script (address) are your funds allocated to?
When scanning private keys in Electrum, you must specify to it which type of script Electrum will scan for the amount, which are:
p2pkh: Legacy address that always starts with
1p2wpkh-p2sh: Nested segwit address, starts with
3p2wpkh: Native segwit address, starts with
bc1
Depending on the address type, you must include the above options as a prefix followed by the private key, e.g.:
p2wpkh:LorKxyz(address...)
Note: for legacy addresses, just enter the private key without the prefix, using the prefix in private keys/legacy addresses is optional.