I don't use it but I am curious about what you posted. By Notes app, do you mean a third-party app? Especially those who are not from trusted companies? Bro, I think this is more risky, you can't trust all these third-party apps to store your seed phrase. Those who still stored it better than you on their gadgets are still being advised to keep it manually which is offline and it is deemed to be the safest approach in this regard. If at all, use the means provided by your gadget directly, not as you did. You never can tell what could happen and I hope you are not a subject of monitoring, the people who you are using their app may be desperate and that might be one of the reasons why some are even building such apps. They could have their backdoors whether you are giving permission or not. I am not that tech-savvy guy but going by the little I've read in this regard, it shows that it is not the smartest thing to do. This is also the reason why I do not import my seed phase anywhere even if the wallet advises me to do so.

I ran into such a situation once and I wrote down the seed phase of my trust wallet in a diary. But when I set off on a long journey with that diary, I fell into the hands of robbers. A group of robbers stole my diary along with my luggage, mobile phone and wallet. Despite my best efforts, I could not keep the diary safe from the bandits. So that was the first experience in my life and I have never forgotten that experience till now.

It's your choice and I won't say it's a good or bad method because each method has its pros and cons. But I want to tell you that all electronic devices have a lifespan and they can fail at any time so storing important data on them is a huge risk. Like in some cases, many people store seed phrases on their hard drive and it is not connected to the Internet at all but once it is irreparably damaged they also lose access into data. I think you need to look at that situation and add other ways to protect your data rather than just storing it on that phone.

I have not lost any of my holdings of Bitcoin or Altcoin by doing anything wrong. But many may have lost their holdings of Bitcoins or Altcoins due to their own mistakes. But there are also some reasons to lose it, one of which is to keep the wallet seed invested carelessly. There are many people who join various airdrop campaigns with their invested wallets who work on all these campaigns and connect the wallets with seed phrases to claim tokens and as a result they lose their holdings. But the safest system for keeping seed phrases is to write the seed phrase in a notebook in such a way that no one can ever find your notebook. Thus if one can keep his wallet seed phrase safe then he will never lose his investment.

Even making yourself that storing or putting up those keys in your own bedroom there's still risks for it to be misplaced on which this is something that would really be having those kind of instances.
This is why myself i did put up my keys on different 3 flashdrives on which one is on the attic of my own bedroom and one is placed on my own personal bag and one is placed on other parts of the house.
Of course its not really that out of reach of other people even with other family members on which we can really be able to make ourselves that confident that it cant be known by other people
whether family members or not.

So far i havent lost mine after 9 years here on crypto space on which i could say that it does still work. I havent that purchased some hardware wallet even those
things i do have doubts that they were totally that not that exposed or have known those pk's or having that tight security or whatsoever.