Dude, this is blatant whataboutism. Puerto Rico is in no way equivalent to Taiwan, and I suspect you know that.
Taiwan is a sovereign, independent, democratic nation. The Chinese Communist Party has never had political control over Taiwan. It just claims the right to overrule the right to self-determination of 23 million people because it feels like it.
The Commonwealth of Puerto Rico is an unincorporated U.S. territory, but it could leave at any time. The commonwealth has held four referendums, none of which have found a strong majority for either statehood or independence, so the island kinda keeps muddling along with the status quo. Puerto Ricans are U.S. citizens, and though they don't have representation in the U.S. federal government, they also don't pay federal taxes and have an elected local government.
The ethics of the situation are not complicated. The CCP can't just decide to subjugate an independent, democratic people.