The issue in the real, not anti Israel, world is opt-in/opt-out donor policies. Up to about 20 years ago Israel was an opt-out country. If you don't want to donate you or your survivors have to opt out, otherwise you're a donor. Don't know if that was law or custom, many countries don't address the issue. At that time organs were taken from palestinians, Israelis, even IDF members without permission That's how it's done in opt-out countries. Not just palestinians as some articles suggest, everyone. The law was changed to opt-in about 20 years ago, so now permission is required.
A couple of links if you're interested in the topic. You can find others.
Presumed vs Expressed Consent in the US and Internationally
Assessing Global Organ Donation Policies: Opt-In vs Opt-Out
Comparison of organ donation and transplantation rates between opt-out and opt-in systems
While explaining the concept of opt-in/opt-out, the articles you cited don’t specifically mention Israel, or Israel’s current policies regarding organ harvesting.
In 2008 Israel enacted its Organ Transplant Law. It is clear that the law was written for the benefit of Israeli citizens - people with the complete rights of full citizenship. There is no indication that anything has changed for non-Israeli citizens, or for non-Israeli citizens during wartime. It appears that the sovereign control which Israel exerts over Palestinian bodies, alive or dead - is still legitimate.
There is a lot real-life testimony which includes Israel’s habit of holding on to the bodies of dead Palestinians for extended periods of time, as well as the desecration of cemeteries and graves.
https://euromedmonitor.org/en/article/5982/Int%E2%80%99l-committee-must-investigate-Israel%E2%80%99s-holding-of-dead-bodies-in-Gaza (November 26, 2023)
https://www.middleeasteye.net/news/supreme-court-allows-israel-withhold-bodies-palestinians (9 September 2019)
Supreme Court allows Israel to continue holding bodies of killed Palestinians
Court approves longstanding policy of retaining bodies of Palestinians killed by Israeli forces by 4-3 majority
For decades, Israel has been following a policy of not releasing the bodies of Palestinians killed by its military to their families.
…Adalah said the lawyers of families of the deceased Palestinians made the argument that holding the bodies violates both international law and Israeli law, which does not permit the military to keep bodies and use them as leverage.
…More than 250 bodies are currently being held at Israeli burial sites and morgues known by Palestinians as "cemeteries of numbers", named after the numbering system that replaces names on graves.
The ruling will be applied on all Palestinians buried in the “cemeteries of numbers” and the ones held in refrigerators since 2015, the last of whom is Bassam al-Sayeh who died Sunday in an Israeli prison.
In 2016, Israeli authorities started promoting the policy as a negotiation tool to return Israeli soldiers detained by Palestinians. At the time, the Israeli military asked for secret meetings with the courts and publicly stated that the detention of the bodies is a pressure card on Gaza.
Israel is the only country in the world currently implementing a policy of confiscation of remains, according to Jerusalem Legal Aid Center (JLAC) and Adalah. It relies on regulations dating back to 1945, during the British Mandate, to give grounds for its policy.