You are correct, pawpaw trees do require a well drained soil. Good drainage is essential for success. However, they also require consistent soil moisture, about 32 inches of water per year, spread evenly throughout the growing season, mostly in the spring and summer. If you have a clay soil this will be your biggest challenge. According to Purdue University Extension, pawpaw will grow in heavy soils but will not survive water-logged conditions. You could berm up the area where you plant your trees. A raised planting area 4-6' across and 3-6" high, for pawpaws, may be advantageous in heavier soils to promote internal soil drainage. If you do this make sure you plant the tree at the correct level. Do not mound up the soil around the newly planted tree. If the pawpaw is grafted on to a different rootstock make sure to keep the graft union above ground. If the pawpaw is planted in a container, keep it at the same level that it is in the container. If the tree is bare root ask the Conservation District to show you how deep to plant it. Your plan to work some compost into the soil is a good idea.

According to your soil test results, your soil pH is 6.7. In my research I found different numbers for the ideal pH for pawpaws but most centered around a slightly acidic soil pH of 5.5-6.8, so your soil is pretty close to ideal. You may want to lower your pH slightly. This can be done by adding elemental or ground sulfur, iron sulfate or aluminum sulfate. Different soils react differently to attempting to change your pH so it may take some time to make this happen. Incorporate whichever product you choose to a depth of 6 inches.

Pawpaw trees are considered heavy feeders so you may want to amend your soil with a fertilizer with equal amounts of Nitrogen-Phosphorous-Potassium such as 20-20-20. Your soil test results recommend adding all three of these nutrients and does provide personalized instructions on how much is needed so please follow those recommendations. Always apply fertilizers according to label instructions. There are some links to “Must Read Tip Sheets” about soil pH and fertilizing techniques on your soil test results and I recommend reading those.

Some kind of mulch around newly planted trees is recommended to keep weed pressure down. Do not apply more than 3-4 inches of mulch because you do not want to change the soil level too much. Pull the mulch away from the trunk to reduce rodent damage.

If you are growing these for their fruit, you may need two different varieties for cross-pollination which will lead to a better fruit set.

The research also says not to plant pawpaw in a low lying area because they do flower early in the spring which makes their blossoms susceptible to late frosts which can damage the flower and reduce fruit production.

Here are several links to articles about growing pawpaws but I would also suggest asking your local Conservation District if they have any information about growing them in Michigan.

https://www.kysu.edu/academics/college-ahnr/school-of-anr/pawpaw/pawpaw-planting-guide.php#:~:text=The%20soil%20should%20be%20slightly,limbs%20and%20horizontally%20held%20leaves.

https://ccetompkins.org/resources/growing-paw-paws#:~:text=Pawpaws%20grow%20best%20in%20slightly,limbs%20and%20horizontally%20held%20leaves.

https://vtechworks.lib.vt.edu/server/api/core/bitstreams/133c9ac3-612e-40cd-b248-981190ba1463/content#:~:text=Best%20soil%20types%20should%20be,to%20promote%20internal%20soil%20drainage.