Paid for games in marketplace loading once then won't download

Use Minecraft beta on Samsung A71, Android 10. Lenovo tb Android 9. And two other tablets also with Android. I purchase world's from the marketplace. I have quite a lot. But....I have 7 that have been played once and will now not download. The games I purchase which will now not download are chinese garden mash up, city maker, advanced furniture, modern furniture, suburbia, Minecraft - good trouble and Dragons. It just has a blue exclamation mark and I cannot play them. So now it makes me very wary of playing world's. In case I am wasting money