Hello, I have ERC20 token on mainnet, want to know is there any possible to update token name and symbol now

nope

No, there is no setters for these two.

What is possible options

Deploy new contract?

Yeh, possibly the only option.

Ok, thank you

check the declaration of `addLiquidityETH`

It has three returned values.

You may want to find a way to deal with them.

That should work.

https://github.com/Uniswap/liquidity-staker/tree/master/contracts

So the staking contracts for Uniswap are actually paying holders fees as the source of staking rewards. If that's true, it would be not possible to issue rewards for regular ERC20 tokens, since there is not fees, unless fees are reserved for staking rewards in every transaction.

Has anyone had the experience with Gnosis Multisig Wallet?

I meant how to type using solidity

Or any examples of smart contracts?

gnosis multisg is just a way to multisig
so you only have to give ownership to the multisig

I think this page has a good explanation.

https://docs.openzeppelin.com/defender/guide-upgrades

you need upgradable contract so?

hi